Haier air conditioner error codes + troubleshooting

Haier is known as a reliable and high-quality air conditioner manufacturer and has been awarded the rank of the best brand around the world for straight 10 years. It is a China-based company that started its operations in 1985 and never looked back since then. They manufacture a long list of home appliances and devices such as refrigerators, washing machines, dryers, microwave ovens, computers, televisions, and air conditioners is one of their specialties. 

To provide all kinds of convenience to their customers, they add multiple features and self-diagnosis is one of those. As soon as your AC unit has an issue, the system will display an error code either by a number or a sequence of LED flashlights. In this article, we have gathered all codes along with their causes and solutions to make this easier for you. Make sure you contact a professional in case you are not much familiar with the components or it includes electricity.

Haier air conditioner error code E1

Causes:

This error is reported by the air conditioner when/if:

1. The room temperature sensor of the indoor unit is not functioning efficiently.
2. The indoor room temperature sensor has an open or short circuit.

Solutions:

1. Check the resistance coefficient of the sensor and if the sensor is faulty or weak, replace it with a new, strong, and compatible one.
2. Inspect the wiring and connections between the main PCB (Printed Circuit Board), Control Board, and the sensor. Repair the wiring and connectors if damaged or loose.
3. Inspect the sensor for any short circuit, open circuit, or any other faults. Replace the sensor if it is defective.
4. Check the main PCB or control board for any malfunction. Replace the control board if faulty.

Seek the help of an HVAC professional whenever needed.

Haier air conditioner error code E2

Causes:

This error is reported by the air conditioner when/if:

1. The heat exchanger sensor of the AC unit is not functioning efficiently.
2. The heat exchanger sensor has an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E1”.

Haier air conditioner error code E4

Causes:

This error is displayed by the air conditioner when/if:

1. The EEPROM of the indoor unit is not functioning properly.
2. The indoor unit EEPROM is erased and the system cannot read any instructions.
3. The EEPROM chip has been damaged because of a voltage fluctuation or short circuit.

Solutions:

1. Restart the air conditioner after keeping it OFF for about 1-2 minutes.
2. Energize it multiple times or reset its settings to default to see if the unit starts reading EEPROM.
3. Contact a company’s engineer to come and re-upload the instructions program into the EEPROM chip.
4. Inspect the EEPROM chip for any burns or damages. Replace the whole PCB if that’s the case.

It is highly recommended to only contact the company’s customer support because they have authentic knowledge of the system’s programming and have full access to this element as well.

Haier air conditioner error code E7, LED1 flash blinks 15 times

Causes:

This error is triggered on the air conditioner when/if:

1. Different components of the indoor unit are unable to communicate with each other.
2. Wires and connections between different components are pinched or loose. Connectors are not in place.
3. The main PCB of the indoor unit is not functioning properly.

Solutions:

1. Turn OFF the AC unit for 5-15 seconds and then turn it ON again.
2. Open the system and look through the wiring, connections, and connectors between the main PCB and defective components i.e. IPM. Repair the wiring and connections as needed.
3. Contact a local professional to inspect the main PCB for any issues. Replace the board if it is faulty.

Haier air conditioner error code E9, LED1 flash blinks 21 times

Causes:

This error is reported by the air conditioner when/if:

1. The air conditioner is detecting high work-intense protection or an overload limit.
2. The evaporator or the condenser coils are covered with dirt and debris.
3. There is a leak in the AC unit.
4. The fans or air filters are clogged because of debris.

Solutions:

1. Restart the air conditioner after keeping it OFF for about 3-5 minutes. Give extra rest if the unit was overheated because of the high-intensity work.
2. Using a meter, check the voltages to make sure they are being supplied in a required and consistent manner. Seek professional help if needed.
3. Clean the evaporator, condenser coils, and air filters to remove dirt and foreign objects (insects, waste, small particles) stuck in them.
4. Inspect the whole system for any leakages. Immediately seek professional help for repairing leaks.
5. Inspect the main PCB for any malfunction. Replace the PCB if it is faulty.
6. Contact a local technician to check the condenser itself for any faults. Repair or replace the components as needed.

Haier air conditioner error code E12, F12, LED1 flash blinks 1 time

Causes:

This error is reported by the air conditioner when/if:

1. The EEPROM of the outdoor unit is malfunctioning.
2. The outdoor unit EEPROM is empty and the system is unable to read any instructions.
3. The EEPROM chip of the outdoor unit is burned or broken.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E4”.

Haier air conditioner error code E14

Causes:

This error is reported by the air conditioner when/if:

1. The fan motor of the indoor unit is malfunctioning.
2. Dirt build-up or some foreign object is stuck in the indoor fan blades.
3. Voltages to the fan motor are not consistent.

Solutions:

1. Turn OFF the AC unit and then turn it ON after a few seconds.
2. Clean the fan blades to remove debris and any other thing causing restriction. Move the fan manually until it starts spinning freely.
3. Check the voltages being supplied to the fan motor. Make sure that they are consistent.
4. Check the capacity level of the indoor fan motor and if it is low, replace the fan capacitor.
5. Contact a technician to check the fan motor for any faults. Repair or replace the motor as needed.
6. Check the main PCB for any malfunction. Replace the board if needed.

Haier air conditioner error code F1, LED1 flash blinks 2 times

Causes:

This error is triggered on the air conditioner when/if:

1. The unit is detecting a high temperature or initiated thermal protection of the IPM (Intelligent Power Module).
2. Instability in the voltages being supplied to the IPM module.
3. Damaged wiring or loose connections of the IPM and between the main PCB.
4. The main PCB is malfunctioning.

Solutions:

1. Turn OFF the AC unit to give some rest for about 5-15 minutes. Turn it ON and energize it.
2. Using a meter, check the voltages of the power line and make sure that they are enough, consistent, and stable.
3. Ensure there aren’t any leaks at any parts of the AC unit. Repair it immediately if there is any.
4. Check the wiring and connection of and around the IPM, especially between the module and the main PCB. Repair harnesses where needed.
5. Check the main PCB for any faults. Replace the component if it’s defective.

Haier air conditioner error code F2, LED1 flash blinks 24 times

Causes:

This error is displayed by the air conditioner when/if:

1. The AC system is detecting an overcurrent of the compressor.
2. Instability in power voltages.
3. Issues in the power supply.
4. The compressor is malfunctioning.

Solutions:

1. Restart the AC unit after keeping it OFF for 1-3 minutes.
2. Check the power line voltages to see if they are enough and consistent. Seek professional help if needed.
3. Contact an HVAC professional to inspect the power supply, wiring, connections, power line, and main PCB for any faults. Repair or replace the defective components as required.
4. If the error persists, check the compressor itself for any faults. Repair or replace as needed.
5. If still getting the error, contact a local technician to check the power line, power supply, and other electrical components and resolve the error accordingly.

Haier air conditioner error code F3, LED1 flash blinks 4 times

Causes:

This error is reported by the air conditioner when/if:

1. The IPM (Intelligent Power Module) and the main PCB (Printed Circuit Board) of the outdoor unit are not able to communicate.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E7”.

Haier air conditioner error code F4, LED1 flash blinks 8 times

Causes:

This error is displayed by the air conditioner when/if:

1. The system is detecting overheat protection for the discharge temperature.
2. Cooling coils or condenser coils are covered with dust.
3. The compressor or fan motor of the AC unit is overheating.
4. Low or wrong refrigerant is running in the AC unit.

Solutions:

1. Turn OFF the AC unit and give it a rest for about 5-15 minutes and then turn it ON again.
2. Clean the cooling coils, evaporator, air filters, and fan to remove dust.
3. Check the discharge temperature sensor and main PCB for any malfunction. Replace the sensor or the control board as needed.
4. Check the refrigerant level and if it is low, refill the gas in the system.
5. The compressor is malfunctioning and needs repairing or in the worst cases, a complete replacement.

Haier air conditioner error codes F6, F66, LED1 flash blinks 12 times

Causes:

This error is triggered by the air conditioner when/if:

1. The ambient temperature sensor of the AC unit is not functioning properly.
2. The ambient temperature sensor has an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E1”.

Haier air conditioner error code F7, LED1 flash blinks 11 times

Causes:

This error is displayed by the air conditioner when/if:

1. The suction temperature sensor of the AC unit is malfunctioning.
2. The suction temperature sensor has an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E1”.

Haier air conditioner error code F8, LED1 flash blinks 9 times

Causes:

This error is reported by the air conditioner when/if:

1. The DC fan motor of the outdoor unit is malfunctioning or has completely failed.

Solutions:

1. Clean the outdoor fan to remove dirt buildup and any other small objects stuck in the fan blades.
2. Move the fan manually until it starts spinning smoothly.
3. Ensure the wiring and connections between the power supply, main PCB and the fan motor are fine and in place.
4. Contact a local technician to check the fan motor for any faults. Repair or replace the outdoor DC fan motor as needed.

Haier air conditioner error code F11, LED1 flash blinks 18 times

Causes:

This error is triggered on the air conditioner when/if:

1. The system deviates from the normal operation of the compressor.
2. Circuit breakers have tripped.
3. The fuses of the AC units are blown away.

Solutions:

1. Turn OFF the AC unit and then turn it ON again after 1-3 minutes.
2. Check and verify that the circuit breakers aren’t tripped.
3. Replace the fuses if they were blown away due to voltage fluctuation.

If the error persists, contact a local technician as this can be an issue in the compressor or power line and need proper troubleshooting and repair.

Haier air conditioner error code F13, LED1 flash blinks 16 times

Causes:

This error is reported by the air conditioner when/if:

1. The refrigerant level or the freon gas in the AC unit is less than the required level.

Solutions:

1. By yourself or with the help of a technician, check the refrigerant level in the unit. Ask the HVAC professional to fill the freon gas if it’s low.
2. Clean the condenser coils and fans to make them free of dirt and debris.

Haier air conditioner error code F19, LED1 flash blinks 6 times

Causes:

This error is triggered on the air conditioner when/if:

1. The power voltages to the AC unit are too high.
2. Power voltages to the power supply or compressor are too low.

Solutions:

1. Check the voltage and make sure they are consistent and active. Seek profieoaoal help if required.
2. Check the power cord, wall socket, main wiring, and connectors for any damages or loose connections. Repair the harnesses where needed.
3. If the error persists, seek professional help to inspect the compressor and power supply for any malfunctioning. Repair or replace the components as needed.

Haier air conditioner error code F21, LED1 flash blinks 10 times

Causes:

This error is reported by the air conditioner when/if:

1. The defrost temperature sensor of the AC unit is not working correctly.
2. AC’s defrost temperature sensor has an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E1”.

Haier air conditioner error code F22, LED1 flash blinks 3 times

Causes:

This error is displayed by the air conditioner when/if:

1. The AC unit is detecting or requires overcurrent protection for the outdoor unit.

Solutions:

1. Restart the AC unit after keeping it on rest for about 5-10 minutes.
2. Check the voltages being supplied and make sure they are enough and consistent. Seek professional help if needed.
3. Seek the assistance of an HVAC professional to check the power supply, compressor, and main PCB for any faults. Repair or replace the components as needed.

Haier air conditioner error code F23, LED1 flash blinks 25 times

Causes:

This error is reported by the air conditioner when/if:

1. The AC unit has activated the overcurrent protection for the single phase of the compressor.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code F22”.
2. If the error persists, check the compressor for any faults. Repair or replace the compressor as needed.

Haier air conditioner error code F25, LED1 flash blinks 13 times

Causes:

This error is displayed by the air conditioner when/if:

1. The discharge temperature sensor of the AC unit is not working properly.
2. The discharge temperature sensor has an open or short circuit.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code E1”.

Haier air conditioner error code F27, LED1 flash blinks 7 times

Causes:

This error is triggered on the air conditioner when/if:

1. The compressor is a locked rotor. It can happen when the compressor tries to kick start, pull too high amps, and fails.
2. The compressor of the AC unit has stopped momentarily.

Solutions:

1. In some cases, the compressor can be brought back to normal operation via mechanical ways.
2. If this doesn’t work, repairing the compressor by a professional or complete replacement are the only two options left to take down this error.

Haier air conditioner error code F28, LED1 flash blinks 19 times

Causes:

This is a loop of the station detect error displayed by the air conditioner when/if:

1. The wiring and connections of the compressor with other components are damaged or loose.
2. The main PCB of the unit is malfunctioning.
3. The compressor itself is faulty.

Solutions:

1. Check the wiring and connections of the compressor and repair them if they are damaged, loose, or wrongly placed.
2. Inspect the main PCB and IPM module for any malfunction. Replace the control board or the module if damaged.
3. If the error persists, the compressor itself is faulty and needs repair or complete replacement.

Haier air conditioner error code LED1 flash blinks 21 times

Causes:

This error is reported by the air conditioner when/if:

1. The system needs overload protection for the indoor unit.

Solutions:

1. Try the exact solutions as suggested for the Haier air conditioner “Error Code F22”.
2. Clean the system to remove dirt as it can cause the unit to work hard to maintain the set temperature for the room.
3. Clean evaporator and air filters as they can get clogged because of continuous dirt build-up. 

Haier Air Conditioner Error Codes for HDU-42CA03 Model

Haier AC error code E0

Causes:

1. This error is reported when there is some issue of condensate drain violation.
2. The condensate drain line hose is clogged.

Solutions:

1. Clean the condensate drain line and make sure it doesn’t have something causing clogging.
2. Contact a local technician as the condensate drain is malfunctioning and needs proper service.

Haier AC error code E1

Causes:

This error is reported by the AC unit when/if:

1. The AC compressor is highly pressurized.
2. Piping or attachments have some issues.
3. Installation is done incorrectly.

Solutions:

1. Clean the condenser and remove anything causing a blockage or restriction in its normal functioning.
2. Contact a local technician to inspect the compressor and related components for any faults. Repair or replace the compressor if needed.

Haier AC error code E

Causes:

This error is displayed on the air conditioner unit when/if:

1. The internal module heat exchanger of the unit is frozen or completely covered with ice.
2. Not enough airflow to the inner side of the AC unit.

Solutions:

1. Turn OFF the AC unit and let it rest for 10-15 minutes. This will defrost the ice from the unit.
2. Clean the air filters to remove clogging. Change them if they are of no use or cannot be serviced.
3. Clean the return grills and remove any restrictions or blockages.
4. Allow proper airflow to the inside of the AC unit.
5. If you still notice ice, contact a local technician to inspect the AC unit for troubleshooting.

Haier AC error code E3

Causes:

1. This error indicates that there is too low pressure in the compressor.
2. Refrigerant charge or gas is leaking from any part of the AC unit.
3. The refrigerant level is low in the AC unit.

Solutions:

1. Check the cooling coils, compressor, condenser, evaporator, and related components for any leakages. Repair the damages immediately.
2. Check the refrigerant charge and if it’s low, seek professional service to fill the freon or gas.

Haier AC error code E7

Causes:

This error is reported by the AC unit when/if:

1. The indoor unit or internal module is not responding to commands being given by the remote control.
2. The remote control is out of the detecting range.
3. Something is acting as a barrier or restriction between the internal module and the remote control of the AC unit.

Solutions:

1. Make sure that the remote control is inside the internal module’s detecting range.
2. Remove any restrictions or barriers coming in between the AC unit and the remote control.
3. Check the remote battery and if it is dead, replace them with a new one.
4. If the error persists, contact a local technician to inspect the internal module for any faults. Repair or replace the module as needed.  

Haier AC error code FF

Causes:

This is a power supply failure error and can occur when/if:

1. The supply is not getting power from the main power source.
2. The wiring and connections of the power supply are loose or damaged.
3. The power supply is malfunctioning.

Solutions:

1. Check and verify that the power cord is properly plugged into the wall power source.
2. Check the power supply wiring, connections, and connectors for any damages. Repair the damages as needed.
3. If the error persists, the power supply is at fault. Call a technician or an electrician to inspect the power supply. Repair or replace if it is faulty.

Haier Air Conditioner Error Codes for HDU-24CA03 Model

Haier AC error code E0

Causes:

This error is a clear indication that the unit is facing:

1. Issues with the power supply.
2. Low voltage in the power line.
3. The AC unit is suddenly consuming a lot of electricity.

Solutions:

1. Turn OFF the AC unit and unplug the power cord. Let the air conditioner rest for 10 minutes and then turn it ON.
2. If the error persists, contact a local technician as your AC unit needs proper service.

Haier AC error code E1

Causes:

1. This error is reported when a button from the front keypad panel is stuck or not working.

Solutions:

1. Turn OFF the AC unit and remove the power cord. Press each button gently until you feel that all buttons have been reset.
2. If the error persists, contact a local technician to open the front keypad panel and verify that all connections are in place.

Haier AC error code E4, STOP

Causes:

1. This error indicates that the tank or tray has been filled and needs to be emptied.
2. The tank float is stuck and the system will not start until you take down the error.

Solutions:

1. Drain all the water out of the tank using the hose, pipe, or whatever mechanism is equipped in your AC system.
2. Open the water reservoir and make sure that no dirt, debris, or a foreign object is causing a clog.
3. Make sure nothing is restricting the normal operation of the tank float.

Haier AC error code High Temp

Causes:

1. This error is displayed on the AC unit when the ambient room temperature exceeds the normal limit of 99°F (37°C).

Solutions:

1. Turn OFF the AC unit and let it rest until the system cools down completely.
2. If you are getting the error when the temperature is in the normal range or after a restart, contact an HVAC technician as the system needs service.