Summer heat is on its way and with it comes the reliance on our trusty air conditioners. But what happens when an error code pops up on your LG AC unit?
Don’t panic! This article will guide you through the meaning of common LG AC error codes and provide simple troubleshooting tips to get your cool air flowing again. From E1 to CH 07, you’ll learn how to diagnose and resolve the issue. So grab a glass of ice water, and read on to become an air conditioning expert.
Table of Contents
LG error code F1, F2, F3
Meaning of code:
If your LG unit has displayed F1, F2, or F3 then there is nothing to worry about because these are just fan speeds and do not represent any kind of error.
How to solve:
Your air conditioner is operating normally so there is no need to take any action.
LG error code 1
Meaning of code:
Error in the indoor unit room temperature sensor
Cause of error:
- Sensor malfunction: The room temperature sensor may be faulty and not accurately reading the temperature. This can be due to a manufacturing defect or damage to the sensor over time.
- Dirty sensor: The room temperature sensor may be dirty, affecting its ability to accurately read the temperature.
- Wiring issue: There may be a problem with the wiring connecting the sensor to the control board, causing the error code.
- Control board issue: The control board itself may be faulty and unable to read the temperature from the sensor.
- Poor connection: The sensor may have a poor connection to the control board, causing the error code.
How to solve:
- Clean the sensor: If the room temperature sensor is dirty, cleaning it may solve the error code. Simply wipe the sensor with a soft cloth to remove any dust or debris that may have accumulated on it.
- Check the wiring: If there is a problem with the wiring connecting the sensor to the control board, you may need to check the wiring and make sure that all connections are secure.
- Check the control board: If the control board is faulty, you may need to have it repaired or replaced. This is typically a job for a trained technician, as it may require specialized equipment and knowledge.
- Replace the sensor: If the room temperature sensor is faulty, you may need to replace it. This is also typically a job for a trained technician, as it may require specialized equipment and knowledge.
LG error code 2
Meaning of code:
Error in the indoor unit pipe sensor
Cause of error:
- Sensor malfunction: The pipe temperature sensor may have malfunctioned and is not accurately reading the temperature. This could be due to a manufacturing defect or damage over time.
- Wiring issue: There may be a problem with the wiring connecting the sensor to the control board, causing the error code to appear.
- Dirty sensor: The pipe temperature sensor may be dirty, which can affect its accuracy in reading the temperature.
- Control board issue: The control board itself may be faulty and unable to read the temperature from the sensor.
- Poor connection: The sensor may have a poor connection to the control board, which can result in an error code.
How to solve:
- Clean the sensor: If the pipe temperature sensor is dirty, cleaning it may resolve the error. Simply wipe the sensor with a soft cloth to remove any dust or debris that may have accumulated on it.
- Check the wiring: If there is a problem with the wiring connecting the sensor to the control board, you may need to check the wiring and make sure that all connections are secure.
- Check the control board: If the control board is faulty, you may need to have it repaired or replaced. This is typically a job for a trained technician, as it may require specialized equipment and knowledge.
- Replace the sensor: If the pipe temperature sensor is faulty, you may need to replace it. This is also typically a job for a trained technician, as it may require specialized equipment and knowledge.
LG error code 3
Meaning of code:
Error in the wired remote control
Cause of error:
- Damaged remote control: If the wired remote control is physically damaged, it may not function properly, causing the error code to appear.
- Wiring issue: There may be a problem with the wiring connecting the remote control to the air conditioner, causing the error code to appear.
- Control board issue: The control board itself may be faulty and unable to receive signals from the remote control, resulting in the error code.
- Improper connection: The remote control may not be properly connected to the air conditioner, causing the error code to appear.
- Battery issue: If the batteries in the remote control are dead or low, it may cause the error code to appear.
How to solve:
- Check the remote control: If the remote control is physically damaged, you may need to replace it. If the remote control is in good condition, proceed to the next step.
- Check the wiring: If there is a problem with the wiring connecting the remote control to the air conditioner, you may need to check the wiring and make sure that all connections are secure.
- Check the control board: If the control board is faulty, you may need to have it repaired or replaced. This is typically a job for a trained technician, as it may require specialized equipment and knowledge.
- Check the connection: Make sure that the remote control is properly connected to the air conditioner.
- Replace the batteries: If the batteries in the remote control are dead or low, replace them with new ones and see if the error code is resolved.
LG error code 4
Meaning of code:
An error in the float switch
Cause of error:
- Float switch malfunction: The float switch, which monitors the water level in the air conditioner drainage pan, may be malfunctioning, causing the error code to appear.
- Blocked drain: If the drain is blocked, water may build up in the drainage pan, causing the float switch to activate and the error code to appear.
- Control board issue: The control board may be faulty and unable to receive signals from the float switch, causing the error code to appear.
How to solve:
- Check the float switch: If the float switch is faulty, you may need to replace it.
- Clear the drain: If the drain is blocked, clear it to allow water to properly drain from the air conditioner.
- Check the control board: If the control board is faulty, you may need to have it repaired or replaced.
LG error code 5
Meaning of code:
Communication problem between the indoor unit and the indoor unit
Cause of error:
- Loose or damaged wiring: There may be a problem with the wiring connecting the indoor and outdoor units, causing the error code to appear.
- Control board issue: Either the indoor or outdoor unit’s control board may be faulty and unable to communicate with the other unit, causing the error code to appear.
- Remote control issue: The remote control may not be properly transmitting signals to the indoor and outdoor units, causing the error code to appear.
How to solve:
- Check the wiring: Check the wiring connecting the indoor and outdoor units and make sure that all connections are secure and there is no damage to the wiring.
- Check the control boards: If either the indoor or outdoor unit’s control board is faulty, you may need to have it repaired or replaced.
- Check the remote control: If the remote control is not properly transmitting signals, replace the batteries or try using a different remote control.
LG error code 9
Meaning of code:
Error in the indoor unit EEPROM which is a programmable and read-only memory chip of the air conditioner
Cause of error:
- Corruption of the EPROM chip: The EPROM chip may be damaged or corrupt, causing the error code to appear.
- Power failure: A power failure during the programming of the EPROM chip may cause corruption and trigger the error code.
How to solve:
EPROM error is related to the internal programming of AC and is typically not something that can be resolved by the homeowner without proper training and equipment. Contacting an LG service center for assistance is the best course of action.
It is recommended to contact an LG service center for assistance. The technician may need to replace the EPROM chip or reprogram it to resolve the error. In some cases, the control board may also need to be replaced. The technician will be able to determine the cause of the error and take the appropriate steps to resolve it.
LG error code 10
Meaning of code:
The BLDC motor fan of the indoor unit is locked.
Cause of error:
- Blocked fan: The fan may be blocked by debris, causing it to stop rotating and trigger the error code.
- Motor failure: The brushless DC motor may be faulty, causing the fan to stop rotating and trigger the error code.
How to solve:
The BLDC motor fan lock error is a complex issue that is typically not something that can be resolved by the homeowner without proper training and equipment. Contacting an LG service center for assistance is the best course of action.
LG error code 21
Meaning of code:
The DC voltage of the compressor was too high (IPM fault, DC Peak)
Cause of error:
- Overloading: The air conditioner may be overloading, causing the DC voltage to rise and trigger the error code.
- Power supply issue: The air conditioner power supply may be unstable or inconsistent, causing the DC voltage to fluctuate and trigger the error code.
- IPM failure: The IPM may be faulty, causing the DC voltage to become too high and trigger the error code.
How to solve:
It is recommended to contact an LG service center for assistance.
The technician may need to replace the inverter power module (IPM), the power supply, or the control board to resolve the error. In some cases, the air conditioner may be overloading, causing the DC voltage to rise, and the technician may need to adjust the load on the air conditioner to resolve the issue.
It is important to note that attempting to repair the air conditioner without proper training and equipment can be dangerous and may also void the warranty. Contacting an LG service center for assistance is the best thing you can do to resolve error code 21.
LG error code 22
Meaning of code:
It means there is a Current Transformer2 (CT2) error; the Alternating current (AC) input is too high.
Cause of error:
- High AC input: The air conditioner AC input may be too high, causing the error code to be triggered.
- CT2 failure: The CT2 may be faulty, causing the alternating current input to become too high and trigger the error code.
How to solve:
Since this is a complex issue, it is recommended to contact an LG service center for assistance. The technician may need to replace the CT2 or the control board to resolve the error. Repairing the air conditioner without proper training and equipment can be dangerous and it may also void the warranty.
LG error code 23
Meaning of code:
DC link low voltage
Cause of error:
- Low voltage: The DC voltage of the air conditioner may be too low, causing the error code to be triggered.
- Power supply issue: The air conditioner power supply may be unstable or inconsistent, causing the DC voltage to fluctuate and trigger the error code.
- Component failure: A component of the air conditioner, such as the control board, may be faulty, causing the DC voltage to become too low and trigger the error code.
How to solve:
DC link low voltage error is a complex issue that is typically not something that can be resolved by the homeowner without proper training and equipment. Contacting an LG service center for assistance is the best course of action to resolve error code 23.
LG error code 25
Meaning of code:
It means AC low/high voltage.
Cause of error:
- Low voltage: The AC voltage of the air conditioner may be too low, causing the error code to be triggered.
- High voltage: The air conditioner AC voltage may be too high, causing the error code to be triggered.
- Power supply issue: The air conditioner power supply may be unstable or inconsistent, causing the AC voltage to fluctuate and trigger the error code.
How to solve:
This is a complex issue that requires technical expertise and equipment to be solved. We recommend you get in touch with the LG service center.
LG error code 26
Meaning of code:
Error code 26, which indicates a “DC Comp Position Error (not providing rotation), Locking” error
It is related to the direct current (DC) compressor position.
Cause of error:
- Compressor malfunction: The DC compressor may be faulty, causing the error code to be triggered.
- Control board malfunction: A component of the air conditioner, such as the control board, may be faulty, causing the DC compressor to become locked and trigger the error code.
- Power supply issue: The power supply of the air conditioner may be unstable or inconsistent, causing the DC compressor to become locked and trigger the error code.
How to solve:
This is a complex issue that requires technical expertise and equipment to be solved. We recommend you get in touch with the LG service center. The technician might replace the control board or DC compressor to solve the issue.
LG error code 27
Meaning of code:
Error code 27, indicates a “PSC Fault; Current to inverter compressor between AC and DC converter circuit too high” error. It is related to the inverter compressor of the air conditioner.
Cause of error:
- Compressor malfunction: The inverter compressor may be faulty, causing the error code to be triggered.
- Circuit issue: A component of the AC-to-DC converter circuit may be faulty, causing the current to the inverter compressor to become too high and trigger the error code.
- Power supply issue: The air power supply may be unstable or inconsistent, causing the current to the inverter compressor to become too high and trigger the error code.
LG error code 28
Meaning of code:
The LG error code 28 indicates that the Inverter compressor DC voltage is too high.
Cause of error:
- High voltage input: The power supply may be providing too high of a voltage to the inverter compressor, causing the DC voltage to become too high and trigger the error code.
- Compressor malfunction: The inverter compressor may be faulty, causing the DC voltage to become too high and trigger the error code.
- Circuit issue: A component of the DC voltage circuit may be faulty, causing the DC voltage to become too high and trigger the error code.
How to solve:
Solving this error code requires technical expertise. A technician will check your AC completely and then replace the inverter compressor or problematic part of the DC voltage circuit.
LG error code 29
Meaning of code:
The LG error code 29 indicates that the inverter compressor amperage is too high.
Cause of error:
- High current draw: The inverter compressor may be drawing too much current, causing the amperage to become too high and trigger the error code.
- Compressor malfunction: The inverter compressor may be faulty, causing it to draw too much current and trigger the error code.
- Circuit issue: A component of the current circuit may be faulty, causing the inverter compressor to draw too much current and trigger the error code.
How to solve:
A trained technician will be able to diagnose the problem and provide a solution. The technician may need to replace the inverter compressor or the component of the current circuit that is causing the issue to resolve the error.
LG error code 31
Meaning of code:
The LG error code 31 indicates that the current-to-current transformer (CT) thermistor is too low.
Cause of error:
- Thermistor malfunction: The thermistor, which is a component of the current circuit, may be faulty and provide incorrect readings, causing the error code to be triggered.
- Circuit issue: A component of the current circuit may be faulty, causing the thermistor to provide incorrect readings and trigger the error code.
- Poor contact: The thermistor may not be making proper contact with the circuit, causing the readings to be incorrect and the error code to be triggered.
How to solve:
The low thermistor issue is a complex issue that is typically not something that can be resolved by the homeowner without proper training and equipment.
The technician may need to replace the thermistor or the component of the current circuit that is causing the issue.
LG error code 32
Meaning of code:
The LG error code 32 occurs due to the inverter Compressor Discharge Pipe (D-Pipe) Overheating.
Cause of error:
- Overheating compressor: The compressor may be working too hard or may be faulty, causing it to overheat and trigger the error code.
- Blockage in the discharge pipe: The discharge pipe, which releases the hot air generated by the compressor, may be clogged, causing the air to build up and trigger the error code.
- Refrigerant issue: The air conditioner may be low on refrigerant, causing the compressor to work harder and overheat, triggering the error code.
How to solve:
Call the LG service center. The technician may need to unblock the discharge pipe, add refrigerant, or replace the compressor to resolve the error.
LG error code 40
Meaning of code:
Error code 40 indicates CT Sensor Error; Thermistor is disconnected or shorted out.
Cause of error:
- Disconnected thermistor: The thermistor, which measures the temperature inside the air conditioner, may be disconnected from its circuit, causing the error code to be triggered.
- Shorted thermistor: The thermistor may have shorted out, causing the air conditioner to think that the temperature is outside of its normal range, triggering the error code.
How to solve:
Replace the thermistor or repair its connection to resolve the error.
LG error code 41
Meaning of code:
Error code 41 indicates that the D-Pipe Sensor INV is disconnected or shorted out.
Cause of error:
- The D-Pipe Sensor, which measures the temperature of the discharge pipe of the inverter compressor, may be disconnected from its circuit, causing the error code to be triggered.
- The D-Pipe Sensor may have shorted out, causing the air conditioner to think that the temperature is outside of its normal range, triggering the error code.
How to solve:
Replace the D-Pipe Sensor or repair its connection to resolve the error.
LG error code 44
Meaning of code:
Error code 44 means the Outdoor Air Sensor is disconnected or shorted out.
Cause of error:
- The Outdoor Air Sensor, which measures the temperature of the air outside the air conditioner, may be disconnected from its circuit, causing the error code to be triggered.
- The Outdoor Air Sensor may have shorted out, causing the air conditioner to think that the temperature is outside of its normal range, triggering the error code.
How to solve:
Replace the Outdoor Air Sensor or repair its connection to resolve the error.
LG error code 45
Meaning of code:
Error code 45 means the middle thermistor of the outdoor unit condenser coil is disconnected or shorted out.
Cause of error:
- The middle thermistor, which measures the temperature of the condenser coil in the outdoor unit, may be disconnected from its circuit, causing the error code to be triggered.
- The middle thermistor may have shorted out, causing the air conditioner to think that the temperature is outside of its normal range, triggering the error code.
How to solve:
Replace the middle thermistor or repair its connection to resolve the error.
LG error code 46
Meaning of code:
Error code 46 means the outdoor unit suction line thermistor is disconnected or shorted out.
Cause of error:
- The suction line thermistor, which measures the temperature of the refrigerant in the outdoor unit, may be disconnected from its circuit, causing the error code to be triggered.
- The suction line thermistor may have shorted out, causing the air conditioner to think that the temperature is outside of its normal range, triggering the error code.
How to solve:
Replace the suction line thermistor or repair its connection to resolve the error.
LG error code 48
Meaning of code:
Error code 48 means the outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out.
Cause of error:
The problem is caused by the outdoor unit coil outlet (liquid line) thermistor being disconnected or shorted out. The thermistor is a temperature sensor that is responsible for monitoring the temperature of the refrigerant in the liquid line. If the thermistor is disconnected or shorted out, the air conditioner will not be able to accurately control the temperature and operation of the refrigerant.
How to solve:
Replace the thermistor or repair the connection to the thermistor. It is recommended not to attempt to repair the air conditioner yourself as it involves handling refrigerant and electrical components, which can be dangerous without proper training and equipment.
LG error code 53
Meaning of code:
Communication failure between the outdoor unit and the indoor unit of the air conditioner
Cause of error:
The LG error code 53 is caused by a communication failure between the outdoor unit and the indoor unit of the air conditioner. This can be caused by several factors, including a damaged or broken communication cable, a malfunctioning communication module, or a problem with the control circuit board in one of the units.
How to solve:
To solve this issue, a professional repair service should be contacted to diagnose and repair the communication failure. They may need to replace the communication cable, module, or circuit board. It is recommended not to attempt to repair the air conditioner yourself as it involves handling electrical components, which can be dangerous without proper training and equipment. Additionally, some of the components may need to be reprogrammed or recalibrated, which requires specialized training and knowledge.
LG error code 60
Meaning of code:
The LG error code 60 (Outdoor unit printed circuit board (PCB) EEPROM checksum error) is related to a problem with the communication between the outdoor unit’s printed circuit board and the EEPROM memory chip.
How to solve:
- Check the connections between the outdoor unit PCB and the EEPROM, and make sure that they are secure and free from any damage.
- Try resetting the air conditioner by turning it off and unplugging it from the power source for at least five minutes.
- If the error persists, consider contacting an authorized LG service center for further assistance. A professional technician can inspect the unit and diagnose the root cause of the problem, and determine the best course of action to repair the unit.
LG error code 61
Meaning of code:
Error code 61 means the outdoor unit condenser coil temperature is too high.
Cause of error:
- Dust, dirt, or other debris blocking the outdoor unit condenser coils can cause the temperature to rise.
- If the refrigerant levels in your air conditioning system are low, it can cause the condenser coils to overheat.
- A faulty fan motor can lead to reduced airflow, causing the condenser coils to overheat.
- A failing compressor can cause the temperature of the condenser coils to increase.
- Any obstruction in the airflow, such as a dirty air filter, can cause the condenser coils to overheat.
How to solve:
- Remove any debris or dust blocking the condenser coils and clean them thoroughly.
- Refill refrigerant: Have a professional check and refill the refrigerant levels if needed.
- If the fan motor is faulty, it should be replaced to prevent further damage.
- If the compressor is failing, it should be replaced to prevent further damage.
- Replace the air filter if it’s dirty or clogged to improve airflow.
LG error code 62
Meaning of code:
Error code 62 means the outdoor unit inverter compressor PCB heat sink temperature is too high.
How to solve:
- Clean or replace the air filter: If the air filter is dirty, it can restrict air flow, causing the heat sink to overheat.
- Clean or replace the air filter, and make sure that it is securely in place.
- Check for blockages in the airflow path. Make sure that the air inlet and outlet grills are not blocked by dust, debris, or other objects.
- Clear any blockages and make sure that the airflow path is clear.
- Check the inverter compressor: If the heat sink temperature continues to be too high, the inverter compressor may need to be repaired or replaced. Contact a licensed HVAC professional to diagnose and fix the problem.
LG error code 63
Meaning of code:
Error code 63 means the temperature of the condenser coil pipe thermistor is too low
How to solve:
- The first step is to inspect the thermistor and make sure it’s connected properly and not damaged. If it’s damaged or disconnected, replace it.
- If the thermistor is connected and in good condition, then check the wiring between the thermistor and the control board. If the wiring is damaged, replace it.
- If the wiring is in good condition, then the control board may be at fault. In this case, you may need to replace the control board to resolve the issue.
- If you are unsure about the cause of the issue or are not comfortable performing the steps above, it’s best to contact a professional HVAC technician for assistance.
LG error code 65
Meaning of code:
When the heat sink thermistor has disconnected or has shorted out then error code 65 appears.
How to solve:
- Check the heat sink thermistor: Ensure that the heat sink thermistor is properly connected and not damaged. If it’s disconnected or shorted out, it will need to be replaced.
- Check the PCB: Inspect the Printed Circuit Board (PCB) to see if there are any visible damages. If the PCB is damaged, it will need to be replaced.
- Check the wiring: Ensure that all the wiring connections are properly connected and not damaged. If any wiring is damaged, it will need to be repaired or replaced.
- Check the power source: Ensure that the power source is stable and not fluctuating. If the power source is fluctuating, it will need to be stabilized.
LG error code 67
Meaning of code:
Error code 67 means there is an Outdoor BLDC fan motor lock error.
How to solve:
- Check the fan motor for any physical damage or blockages.
- Check the fan motor wiring for any loose connections or damage.
- Check the fan motor operation by running a test from the control panel.
- Check the fan motor power supply for any voltage fluctuations or issues.
If the problem persists, the fan motor may need to be replaced.
LG error code CH34
Meaning of code:
Error code CH34 appears when the unit powers OFF due to abnormal pressure in the sealed system.
This is not a problem but a feature to protect the AC unit from overheating.
How to solve:
- Shield the unit from the sun’s rays and extreme weather conditions by installing a canopy or awning over the air conditioner.
- Ensure proper air circulation by regularly cleaning the condenser coils.
- Avoid completely shutting off the air conditioner when you are away from the home. Instead, raise the temperature to a higher setting to maintain better cooling and humidity control and reduce the strain on the unit when you return and need more cooling.
- Regularly check the air filters and keep them clean, as clogged filters can restrict airflow and put additional strain on the unit. Additionally, make sure the air vents and ducts are not blocked to prevent airflow restrictions.
- Keep the refrigerant levels in the unit at optimal levels by regularly having them checked and topped up if necessary.
LG error code E2 or CH01
Meaning of code:
AUTO-STOP protection due to open or short circuit in the indoor pipe sensor
How to solve:
- Turn off the air conditioner and disconnect the power supply.
- Check the connections of the indoor pipe sensor and make sure they are secure and properly connected. If the connections are loose, tighten them.
- Check the wiring of the indoor pipe sensor for any visible signs of damage, such as frayed wires or broken insulation. If you find any damaged wiring, contact a professional HVAC technician to repair it.
- Test the continuity of the indoor pipe sensor using a multimeter. If the sensor is not functioning properly, replace it with a new one.
- Once the indoor pipe sensor has been inspected and repaired or replaced as necessary, restart the air conditioner and check to see if the error code has been resolved.
LG error code E3 or CH03
Meaning of code:
The air conditioner has detected there is no refrigerant in the unit.
How to solve:
To resolve this issue, follow these steps:
- Turn off the air conditioner and disconnect the power supply.
- Check for any visible refrigerant leaks, including the connections and the pipes. If you find any leaks, contact a professional HVAC technician to repair them.
- Check the refrigerant level in the system and, if necessary, recharge the system with the recommended amount of refrigerant. This is a task that should be performed by a licensed and certified HVAC technician.
- Once the refrigerant level has been restored, restart the air conditioner and check to see if the error code has been resolved.
LG error code E4
Meaning of code:
The code E4 does not mean there is any error in the AC. It just tells you that the air conditioner is in defrost mode.
How to solve:
This situation arises when the air conditioner detects ice buildup on the evaporator, which is positioned behind the front grille. Once the ice has melted and the evaporator is defrosted, the unit will return to its normal functioning.
LG error code E5
Meaning of code:
The water collection tank of your unit is full.
How to solve:
To thoroughly drain the water collection tank:
- Remove the bottom drain cap to allow any remaining water to drain out.
- Wait until all water has completely emptied from the tank and there is no more flow.
- Replace the drain cap securely back onto the bottom of the tank.
LG error code FL or P2
Meaning of code:
The drain pan of your LG unit is full.
How to solve:
In typical circ*mstances, it’s not necessary to empty the drain pan as the air conditioner has a slinger fan that’s placed above it. The purpose of this fan is to collect the water and direct it to the condenser for effective heat release. Generally, the amount of water in the drain pan is minimal and wouldn’t result in the air conditioner shutting down.
You need to check which of the following conditions are you facing and then take the action steps recommended:
Does the error code FL or P2 appear repeatedly?
If yes, follow the instruction below.
Take the drain port cap off and tilt the unit backward so that the water drains out through the outlet. If the unit is in COOL mode and the error code keeps recurring, it’s a sign that the humidity level in the room is high and the unit is functioning optimally.
To minimize the need for frequent draining, you can set the fan speed to LOW. This will reduce the airflow in the room and the amount of moisture being removed by the unit. Additionally, make sure all windows and doors are closed to create a closed environment.
When the unit is in DRY mode, it primarily operates to remove moisture from the air. Switching the setting to COOL mode can decrease the amount of moisture being removed from the room. Some models may come with a hose connection for constant draining, for which you should refer to the specific owner’s manual.
LG unit displays error code FL or P2 but doesn’t drain any water out.
If yes, follow the instructions below.
Start by removing the drain port cap and tilting the unit backward to allow the water to escape through the outlet. If this does not result in any water draining, it means that the air conditioner requires maintenance.
You have drained the air conditioner but error codes FL or P2 do not go.
If yes, follow the instructions below.
Reset the AC:
- Disconnect the power supply to the unit by unplugging it from the electrical outlet.
- Wait for at least 10 seconds.
- Reconnect the air conditioner by plugging it back in.
- Press the POWER button to turn the unit on again.
If the P2 or FL error code still appears after the reset, it may indicate that the air conditioner requires a repair service.
Error code FL or P2 display but the air conditioner does not shut down?
If yes, it may indicate that the air conditioner requires a repair service.
LG error code CH02
If you are encountering a fault with either the indoor pipe sensor or outdoor sensor assembly, including an open or short circuit, the recommended solution is to disconnect the sensor from the circuit board and measure its resistance. As a reference, the air sensor should have a resistance of 10 kOhm at 25°C, while the pipe sensor should have a resistance of 5 kOhm at 25°C. If the measured resistance does not match these values, it is recommended to replace the faulty sensor.
LG error code CH04
If you are encountering a “Heat Sink Sensor Error” with a residential air conditioning (RAC) product, it could indicate an open or short circuit, or that the temperature has exceeded 95°C. In this case, it is recommended to check the sensor and resolve the issue accordingly.
If you are encountering an issue with a commercial product and the error message states that the “Condensate pump float switch has risen,” you should check the following:
- Ensure that the drain pan is empty.
- Verify that the pump is working correctly.
- If there is no pump, check to see if the blue jumper plug is inserted in the socket CN Float.
These steps should help resolve the issue with the condensate pump float switch.
LG error code CH05
If you are encountering a CH05 “Comms Error,” it is likely a communication issue between components. To resolve the issue, you should follow these steps:
- Check your wiring for any loose or damaged connections.
- Remove any external pumps that may be interfering with communication.
If the issue is with a split or multi-system:
- Check the voltage between terminal N and 3, it should be between 0 and 65 Vdc.
If the issue is with a Multi V system:
- Check the voltage between terminals 3 and 4, it should be 4 Vdc.
These steps should help resolve the communication error and restore the normal functioning of the system.
LG error code CH06
If you are encountering error CH06 – a fault with the indoor unit coil sensor, the recommended solution is to disconnect the sensor from the circuit board and measure its resistance. The sensor should have a resistance of 10 kOhm at 10°C and 4 kOhm at 30°C. If the measured resistance does not match these values, it is recommended to replace the faulty sensor.
For a split system, you should text “21” to resolve the issue.
LG error code CH07
If you are encountering an issue with a Multi Splits or Multi V system and the indoor unit is set to run in a different mode from the master indoor unit, the solution is to set all indoor units to either cooling or heating to clear the error.
For Split systems, if the error message states “Compressor Overcurrent (CT2),” it could indicate an issue with the compressor. Additionally, it is recommended to check the Code 06 error, as it may provide additional information on the issue. These steps should help resolve the issue and restore the normal functioning of the system.
LG error code CH08
If you are encountering an issue with the fan motor, the following steps should be taken to troubleshoot the problem:
- Check that the fan motor turns freely and is not obstructed or stuck.
- Check the AC voltage supplied to the fan motor. The voltage should vary from 120 V AC at low speed to 170 V AC at high speed.
- If no voltage is present, it could indicate a problem with the power supply or a disconnected wire. If the voltage is present but the fan motor is still not functioning, it may be a problem with the fan motor itself and may need to be replaced.
LG error code CH09
If you are encountering an issue with a Split system and the error message states “Outdoor unit fan problem,” the following steps should be taken:
- Check that the outdoor fan motor is properly plugged in and is both electrically and mechanically sound.
- If the fan motor is not working, replace it.
- If the fan motor is working but the problem persists, replace the circuit board (PCB).
For Multi V systems, if the error message indicates “indoor PCB failure,” it is recommended to replace the indoor circuit board (PCB) to resolve the issue.
LG error code CH10
If you are encountering an issue with a RAC (Residential Air Conditioning) product and the error message states “Compressor discharge sensor fault,” the following steps should be taken:
- Disconnect the compressor discharge sensor from the circuit board (PCB).
- Measure the resistance of the sensor. It should be 237 kOhm at 20°C and 168 kOhm at 30°C.
- If the measured resistance does not match these values, it is recommended to replace the faulty sensor.
For Multi Fdx and Multi V systems, the solution is to text “8” to resolve the issue.
LG error code CH11
If you are encountering an issue with a Multi V system and the error message indicates that the indoor unit is not connected to an outdoor unit.
If you want to fix this problem, follow our instructions:
- Check that the communication wiring is correct and all connections are secure.
- Verify that the system initialization has been carried out correctly.
- If the wiring and initialization are correct but the issue persists, it could indicate a problem with the indoor or outdoor unit and further troubleshooting may be required.
LG error code CH12, CH13, CH14, CH15, CH16, CH17, CH18, CH19, CH20
If you have received any of these error codes with a message stating “no such fault code,” it means that the fault code you have entered is not recognized by the system.
To resolve this issue, please follow the instructions provided in the error message: “Text one, two, or three-digit fault code number only. For eg, If fault code CH07 appears, only type 7 in your text message.”By sending only the numerical part of the fault code, you can help the system better identify the issue and provide a more accurate solution.
LG error code CH21, CH22
Error code CH21 or CH22 indicates “Inverter compressor run current high,”. If you want to fix this problem, follow the given instructions:
- Check the compressor windings and ensure that they have equal resistance values of 1 to 4 Ohms.
- Check the resistance of the windings to earth and make sure it is at least 50 MOhms.
- Verify the run current of the compressor to ensure that it is within normal operating limits.
It may also be necessary to replace components such as the compressor or control board if they are found to be faulty.
LG error code CH23
Error code CH23 indicates “Inverter DC voltage low,”. If you want to fix this problem, follow the given instructions:
- Check the DC voltage of the capacitors and ensure that it meets the specified values: 300 Vdc for 1-phase systems and 600 Vdc for 3-phase systems.
- If the capacitors have the correct voltage, the outdoor inverter PCB likely needs to be replaced.
- This issue may occur if the inverter DC voltage is lower than the expected value, which can impact the performance of the system. Replacing the outdoor inverter PCB can restore the proper operation of the system.
- However, if the problem persists after replacing the PCB, further troubleshooting may be necessary to diagnose the root cause of the issue.
LG error code CH24
Error code CH24 indicates “High or low-pressure trip,”. If you want to fix this problem, follow the given instructions:
- Check the system pressure to determine if it is either too low (below 1 bar) or too high (above 35 bar).
- If the pressure is too low, check for leaks in the system and make sure the refrigerant level is sufficient. If the pressure is too high, check the refrigerant level and ensure that the pressure relief valve is functioning properly.
If the problem persists, further troubleshooting may be necessary to diagnose the root cause of the issue.
In the case of Multi V systems, the error message may indicate a “High-pressure trip,” which indicates that the system pressure has exceeded the maximum allowed value. This issue should be addressed in the same manner as a high-pressure trip in a Split or Multi-Split system.
LG error code CH25
Error code CH25 indicates a problem with the power supply voltage to the outdoor unit, If you want to fix this problem, follow the given steps:
- Verify that the power supply voltage to the outdoor unit is within the specified range: 1-phase systems should have a voltage of 220 Vac ±10% and 3-phase systems should have a voltage of 380 Vac ±10%.
- If the voltage is within the specified range, check the fuses for any issues.
- If the fuses are functioning properly, the outdoor main PCB likely needs to be replaced.
This issue may occur if the power supply voltage is incorrect or if there is a problem with the fuses. Replacing the outdoor main PCB can restore the proper operation of the system. However, if the problem persists after replacing the PCB, further troubleshooting may be necessary to diagnose the root cause of the issue.
LG error code CH26
The error code CH26 indicates an issue with the inverter compressor being seized. The following instructions must be followed to resolve the issue:
- Verify the resistance of the compressor windings. The resistance should be equal and fall within the 1 to 4 Ohms range.
- Check the resistance to earth, which should be at least 50 MOhms.
- Verify the run current and outputs of the inverter.
If the compressor windings or the inverter are functioning improperly, it may be necessary to replace these components to restore the proper operation of the system.
LG error code CH27
The error code CH27 indicates an issue with an irregularity in the inverter current. This is how you can resolve the issue:
- Check the inverter PCB (Printed Circuit Board) for any signs of damage or malfunction.
- Check the reactor, which is a component in the inverter circuit that helps regulate the current flow.
If the PCB or reactor are damaged, it may be necessary to replace them to resolve the issue with the irregularity in the inverter current.
LG error code CH28
The error code CH28 indicates an issue with high DC voltage in the inverter. Here is how you can resolve the issue:
- Check the DC voltage of the capacitors. For single-phase systems, the voltage should be 300 VDC, and for three-phase systems, it should be 600 VDC.
- If the voltage of the capacitors is within the expected range, then it is likely that the issue is with the outdoor inverter PCB (Printed Circuit Board).
- If the issue is determined to be with the outdoor inverter PCB, it will need to be replaced to resolve the problem with the high DC voltage in the inverter.
LG error code CH29, CH30, CH31
If you have received any of these error codes with a message stating “no such fault code,” it means that the fault code you have entered is not recognized by the system.
To resolve this issue, please follow the instructions provided in the error message: “Text one, two, or three-digit fault code number only. For eg, If fault code CH07 appears, only type 7 in your text message.”
By sending only the numerical part of the fault code, you can help the system better identify the issue and provide a more accurate solution.
LG error code CH32, CH33
Error codes CH32 and CH33 indicate a high discharge temperature from the inverter/standard compressor. Here’s what to do to solve the issue:
- Check the discharge temperature of the compressor. If it exceeds 105°C, it may be a sign of a refrigerant charge issue.
- Verify the refrigerant charge levels to ensure that there are no leaks or imbalances.
- If the high discharge temperature from the inverter/standard compressor is found to be caused by a refrigerant charge issue, then it is important to address this issue as soon as possible to prevent further damage to the system.
LG error code CH34
Error code CH34 means Elevated High Pressure.
If the high-pressure reading is above 35 bars at the high-pressure sensor, check the pressure levels, ensure the coils and filters are clean and inspect the system pipework for any obstructions.
LG error code CH35
Error code CH35 means Decreased Low Pressure.
If the low-pressure reading is below 1 Bar at the low-pressure sensor, check the pressure levels and verify that the service valves are open.
LG error code CH36, CH37, CH38, CH39
If you have received any of these error codes with a message stating “no such fault code,” it means that the fault code you have entered is not recognized by the system.
To resolve this issue, please follow the instructions provided in the error message: “Text one, two, or three-digit fault code number only. For eg, If fault code CH07 appears, only type 7 in your text message.”
By sending only the numerical part of the fault code, you can help the system better identify the issue and provide a more accurate solution.
LG error code CH40
Error code CH40 means abnormal current in the inverter AC. Verify that the resistance of the compressor windings is equal and ranges from 1 to 4 Ohms. Ensure that the earth resistance is at least 50 MOhms. Examine the run current and the outputs of the inverter.
LG error code CH41
Error code CH41 means a fault was detected in the discharge sensor of the inverter compressor.
To diagnose the issue, disconnect the sensor from the circuit board and measure its resistance. At 20°C, the resistance should be 237 kOhm, and at 30°C, it should be 168 kOhm.
LG error code CH42
Error code CH42 means a fault in the low-pressure sensor.
To diagnose the issue, check the DC voltage between the white and black cables on the plug. The voltage should range from 1 VDC (equivalent to 4 bar) to 5 VDC (equivalent to 32 bar) when using the Multi V system.
LG error code CH43
Error code CH43 means a fault in the high-pressure sensor.
To diagnose the issue, check the DC voltage between the white and black cables on the plug. The voltage should range from 1 VDC (equivalent to 8 bar) to 2.5 VDC (equivalent to 37 bar) when using the Multi V system.
LG error code CH44
Error code CH44 means a fault was detected in the air sensor of the outdoor unit.
To diagnose the issue, disconnect the sensor from the circuit board and measure its resistance. At 30°C, the resistance should be 8 kOhm, and at 20°C, it should be 13 kOhm. If the resistance readings are within the expected range, replace the circuit board. If not, replace the sensor.
LG error code CH45
It means there is a fault detected in the coil sensor of the outdoor unit.
To diagnose the issue, disconnect the sensor from the circuit board and measure its resistance. At 10°C, the resistance should be 10 kOhm, and at 30°C, it should be 4 kOhm. If the resistance readings are within the expected range, replace the circuit board. If not, replace the sensor.
LG error code CH46
It means there is a fault detected in the suction sensor of the outdoor unit.
To diagnose the issue, disconnect the sensor from the circuit board and measure its resistance. At 10°C, the resistance should be 10 kOhm, and at 30°C, it should be 4 kOhm. If the resistance readings are within the expected range, replace the circuit board. If not, replace the sensor.
LG error code CH47
Error code CH47 means a fault was detected in the discharge sensor of the compressor.
To diagnose the issue, disconnect the sensor from the circuit board and measure its resistance. At 20°C, the resistance should be 237 kOhm, and at 30°C, it should be 168 kOhm. If the resistance readings are within the expected range, replace the circuit board. If not, replace the sensor.
LG error code CH48
Error code CH48 appears when in a Split/Multi-Split system; if the outdoor unit discharge and air sensors are both unplugged, or in a Multi V system if the outdoor unit coil sensor is unplugged.
LG error code CH49
If there is an issue with the outdoor unit, first verify that the power supply voltage is correct.
In a single-phase system, it should be 220 Vac ±10%, and in a three-phase system, it should be 380 Vac ±10%.
If the voltage is within the acceptable range, check the fuses. If the fuses are functioning properly, replace the outdoor main circuit board.
LG error code CH51
Error code CH51 means a unit mismatch has been detected.
To resolve the issue, verify that the model numbers of the units do not exceed the maximum limit. In a Multi V system, also check the Sub outdoor unit dipswitch settings to ensure they are configured correctly.
LG error code CH52
An error has occurred in the communication between the inverter circuit board and the main outdoor unit circuit board.
To diagnose the issue, check the wiring, fuses, and LED indicators. If everything appears to be functioning properly, one of the circuit boards (either the inverter or the main PCB) is likely to be defective and needs to be replaced.
LG error code CH53
A communication error has been detected between the indoor and outdoor units.
To resolve the issue, check the wiring connections. In a Split or Multi-Split system, check the voltage between terminal N and 3, which should be 0 – 65 Vdc. In a Multi V system, check the voltage between terminals 3 and 4, which should be 4 Vdc.
LG error code CH54
A reverse or open phase has been detected.
To diagnose the issue, verify that all three phases are present and correct. If the correct voltage is present at all three phases, try swapping any two of them to correct the fault.
LG error code CH57
A communication error has been detected between the outdoor main circuit board and the inverter circuit board.
To diagnose the issue, check the wiring, fuses, and LED indicators. If everything appears to be functioning properly, one of the circuit boards (either the inverter or the main PCB) is likely to be defective and needs to be replaced.
LG error code CH60
An issue has been detected with the EEPROM on the outdoor unit circuit board.
If the EEPROM is removable, try removing it and refitting it to see if there is a contact fault. If the EEPROM is non-removable, the entire circuit board needs to be replaced.
LG error code CH61
The temperature of the condenser coil has exceeded 65°C.
To resolve the issue, check the coil and filters to ensure they are clean and free from debris, and verify that airflow is adequate. Additionally, check the system pressures for the presence of any non-condensable.
LG error code CH62
The temperature of the inverter has exceeded 85°C.
To resolve the issue, check the airflow across the heat sink, and ensure that the inverter is properly attached to the heat sink with thermal paste. In the case of a Multi V system, also check the inverter cooling fan to ensure it is functioning properly.
LG error code CH65
A fault has been detected with the outdoor unit’s inverter fin temperature sensor.
To diagnose the issue, disconnect the sensor from the circuit board and measure its resistance. The reading should be 8 kOhm at 30°C and 13 kOhm at 20°C.
LG error code CH67
The outdoor fan motor has either seized or there is a failure in the rotation sensing circuit.
To resolve the issue, check the fan motor for both mechanical and electrical failures.
LG error code CL
CL means Child Lock
To activate or deactivate this function, press the Timer and Min buttons simultaneously for 5 seconds.
LG error code HL
Error code HL means the condensate pump float switch has risen.
- Check if the drain pan is empty.
- Check if the pump is working normally.
- If there is no pump, then check if the blue jumper plug has been inserted in the CN float socket.
LG error code Po
Po means Jet Cool Mode has been selected.
If you want to cancel this function, press the Fan Speed, Set Temperature, or Jet Cool buttons.
LG error code help
When you see this, you need to text the one, two, or three-digit fault code number.
For example, if you have received error code CH07 on the remote controller or indoor unit, then you need to type 07 or only 7 in the text message.
LG error code CH50, CH55, CH56, CH58, CH59, CH63, CH64
If you have received any of these error codes with a message stating “no such fault code,” it means that the fault code you have entered is not recognized by the system.
To resolve this issue, please follow the instructions provided in the error message: “Text one, two, or three-digit fault code number only. For eg, If fault code CH07 appears, only type 7 in your text message.”
By sending only the numerical part of the fault code, you can help the system better identify the issue and provide a more accurate solution.
