Haier Air Conditioner Error Codes

Complete Haier Air Conditioner Guide

This guide explains all Haier Air Conditioner error codes (CH series) with simple troubleshooting steps to help you identify and fix common issues safely before calling a technician.

E1
High Pressure Protection
  • Clean condenser coils and outdoor unit.
  • Ensure proper airflow around the condenser.
  • Check outdoor fan operation.
  • Contact a technician if pressure remains high.
E2
Indoor Coil Freeze Protection
  • Clean or replace air filters.
  • Inspect evaporator coil for ice buildup.
  • Check indoor fan operation.
  • Allow unit to defrost before restarting.
E3
Low Pressure Protection
  • Check for refrigerant leaks.
  • Inspect system pressures.
  • Ensure filters are clean.
  • Contact a qualified technician if needed.
E4
Compressor Discharge Temperature Protection
  • Turn off the air conditioner.
  • Check condenser airflow.
  • Inspect refrigerant system.
  • Restart after the unit cools down.
E5
Overcurrent Protection
  • Check power supply voltage.
  • Inspect electrical connections.
  • Reset the air conditioner.
  • Replace faulty electrical components if required.
E6
Communication Error
  • Turn power off for 5 minutes.
  • Inspect communication wiring.
  • Check indoor and outdoor PCB connections.
  • Replace faulty control board if necessary.
E7
Mode Conflict Error
  • Ensure all connected units use the same mode.
  • Restart the system.
  • Check controller settings.
  • Reset operating mode if needed.
E8
Indoor Fan Motor Fault
  • Inspect fan motor wiring.
  • Check for obstructions.
  • Test fan motor operation.
  • Replace motor if defective.
F1
Indoor Ambient Temperature Sensor Fault
  • Inspect sensor wiring.
  • Check connector condition.
  • Test sensor resistance.
  • Replace faulty sensor.
F2
Indoor Coil Temperature Sensor Fault
  • Inspect evaporator sensor connection.
  • Check for damaged wiring.
  • Measure sensor resistance.
  • Replace sensor if defective.
F3
Outdoor Ambient Sensor Fault
  • Inspect outdoor sensor wiring.
  • Check sensor placement.
  • Test resistance values.
  • Replace sensor if readings are incorrect.
F4
Outdoor Coil Temperature Sensor Fault
  • Inspect condenser sensor wiring.
  • Check sensor connector.
  • Measure resistance values.
  • Replace faulty sensor.
F5
Compressor Discharge Sensor Fault
  • Inspect discharge temperature sensor.
  • Check wiring harness.
  • Test sensor readings.
  • Replace sensor if necessary.
FC
Refrigerant Leak Detection
  • Turn off the air conditioner.
  • Inspect for refrigerant leaks.
  • Check pipe connections.
  • Contact a certified technician for repair.
H1
Defrost Mode Active
  • This is a normal operating condition.
  • Wait for the defrost cycle to finish.
  • Do not disconnect power.
  • Cooling or heating will resume automatically.
H3
Compressor Overload Protection
  • Allow the compressor to cool down.
  • Check condenser cleanliness.
  • Inspect voltage supply.
  • Restart unit after cooling.
H6
Indoor Fan Motor Blocked
  • Turn off the unit.
  • Remove debris from fan assembly.
  • Check motor wiring.
  • Replace fan motor if necessary.
P1
Voltage Protection
  • Check household voltage stability.
  • Inspect outlet and breaker.
  • Use a voltage regulator if needed.
  • Restart the unit once voltage normalizes.
P2
Compressor Current Protection
  • Inspect compressor wiring.
  • Check operating current.
  • Ensure condenser airflow is unobstructed.
  • Replace faulty components if needed.
P4
Compressor Drive Error
  • Reset the air conditioner.
  • Inspect inverter module connections.
  • Check compressor operation.
  • Replace inverter board if required.
P7
Outdoor Fan Motor Fault
  • Inspect outdoor fan blades.
  • Check motor wiring and connectors.
  • Test fan motor operation.
  • Replace outdoor fan motor if defective.
P8
Compressor Overheating
  • Turn off the air conditioner.
  • Inspect condenser airflow.
  • Check refrigerant levels.
  • Restart after cooling down.
E9
Water Collection Tank Full
  • Empty the condensate drain pan or tank.
  • Inspect drain hose for blockage.
  • Ensure drain line is installed correctly.
  • Restart the air conditioner after draining.
EA
EEPROM Memory Error
  • Turn power off for 10 minutes.
  • Inspect control board connections.
  • Reset appliance settings.
  • Replace PCB if error returns.
EC
Refrigerant System Protection
  • Check refrigerant pressures.
  • Inspect for refrigerant leaks.
  • Clean indoor and outdoor coils.
  • Contact a technician if issue persists.
EE
Indoor Unit Memory Fault
  • Power cycle the air conditioner.
  • Inspect indoor PCB connections.
  • Check for moisture damage.
  • Replace memory chip or PCB if necessary.
EF
Outdoor Unit Memory Fault
  • Disconnect power and restart system.
  • Inspect outdoor control board.
  • Check communication wiring.
  • Replace PCB if fault continues.
FA
Indoor Temperature Sensor Open Circuit
  • Inspect sensor wiring for breaks.
  • Check sensor connector.
  • Test sensor continuity.
  • Replace sensor if circuit is open.
FB
Indoor Temperature Sensor Short Circuit
  • Disconnect power before inspection.
  • Inspect sensor wiring for damage.
  • Test resistance values.
  • Replace faulty temperature sensor.
FD
Outdoor Temperature Sensor Open Circuit
  • Inspect outdoor sensor wiring.
  • Check connector condition.
  • Test continuity of sensor.
  • Replace sensor if necessary.
FE
Outdoor Temperature Sensor Short Circuit
  • Inspect outdoor sensor harness.
  • Check for damaged insulation.
  • Measure sensor resistance.
  • Replace faulty sensor.
FH
Indoor Coil Sensor Fault
  • Inspect evaporator sensor placement.
  • Check wiring connections.
  • Test sensor resistance values.
  • Replace sensor if readings are incorrect.
FC
Outdoor Coil Sensor Fault
  • Inspect condenser coil sensor.
  • Check sensor harness for damage.
  • Verify resistance readings.
  • Replace sensor if defective.
P0
Inverter Module Protection
  • Turn power off for several minutes.
  • Inspect inverter board connections.
  • Check compressor operation.
  • Replace inverter module if fault persists.
P3
Compressor Temperature Protection
  • Allow compressor to cool down.
  • Clean condenser coil thoroughly.
  • Inspect refrigerant charge.
  • Restart unit after cooling.
P5
IPM Module Protection
  • Disconnect power immediately.
  • Inspect inverter board components.
  • Check cooling airflow around electronics.
  • Replace IPM module if defective.
P6
Compressor Startup Failure
  • Inspect compressor wiring.
  • Check capacitor if applicable.
  • Verify supply voltage.
  • Replace compressor if unable to start.
P9
Outdoor Unit Protection Mode
  • Check outdoor airflow.
  • Inspect condenser cleanliness.
  • Allow system to stabilize.
  • Restart after correcting issues.
PL
Low Voltage Protection
  • Measure household voltage.
  • Inspect breaker and outlet.
  • Avoid extension cords.
  • Use a voltage stabilizer if needed.
PH
High Voltage Protection
  • Check incoming voltage supply.
  • Inspect electrical connections.
  • Disconnect power if voltage is excessive.
  • Contact an electrician if necessary.
LC
Child Lock Activated
  • Press and hold the lock button.
  • Refer to the owner's manual for unlocking.
  • Reset the remote controller.
  • Restart the unit if controls remain locked.
PC
Compressor Protection Delay
  • Wait 3–5 minutes before restarting.
  • This is often a normal protection function.
  • Ensure stable power supply.
  • Monitor for recurring faults.

Frequently Asked Questions


Why is my Haier air conditioner not cooling properly?
Check that Cool mode is selected and the temperature is set correctly. Clean or replace dirty air filters, ensure doors and windows are closed, and inspect the outdoor unit for airflow restrictions.
Why is my Haier air conditioner not turning on?
Check the power outlet and circuit breaker. Ensure the power cord is securely connected, replace remote control batteries if needed, and try resetting the unit by disconnecting power for several minutes.
Why is my Haier air conditioner leaking water?
Inspect the drain hose for blockages or kinks. Clean dirty air filters, ensure the indoor unit is installed correctly, and check for ice buildup on the evaporator coil.
Why is my Haier air conditioner making loud noises?
Check for loose panels, debris in the fan, or vibrating components. Ensure the indoor and outdoor units are securely mounted and inspect the fan motor if unusual noises continue.
Why does my Haier air conditioner smell bad?
Clean the air filters, evaporator coil, and drain pan. Remove any mold or moisture buildup and run Fan mode periodically to help dry internal components.
Why is my Haier air conditioner blowing warm air?
Verify that Cooling mode is selected and the temperature setting is lower than room temperature. Clean filters, inspect the outdoor unit, and check refrigerant levels if cooling remains weak.
Why is my Haier AC remote control not working?
Replace the batteries and ensure there are no obstructions between the remote and indoor unit. Check for sensor damage and reset the air conditioner if necessary.
Why does my Haier air conditioner turn off by itself?
Check timer settings, Sleep mode, and power supply stability. Clean air filters to prevent overheating and inspect for any active error codes on the display.
Why is my Haier air conditioner not responding to controls?
Reset the unit by disconnecting power for several minutes. Check the remote control batteries, inspect the control panel, and verify that the appliance is receiving power.
How do I reset my Haier air conditioner?
Turn off the air conditioner and disconnect power for 5–10 minutes. Restore power, restart the unit, and reconfigure settings if necessary.
Why is my Haier air conditioner freezing up?
Clean dirty air filters, ensure vents are open, and check indoor fan operation. Low refrigerant levels or restricted airflow can also cause ice buildup.
Why is my Haier air conditioner not heating?
Ensure Heating mode is selected and allow several minutes for the system to start. Check filters, outdoor unit operation, and verify that outdoor temperatures are within operating limits.
Why is my Haier air conditioner running constantly?
Check thermostat settings, clean filters, and ensure doors and windows are closed. Dirty coils or insufficient cooling capacity can cause extended operation.
Why is my Haier air conditioner not draining properly?
Inspect the condensate drain hose for blockages or improper installation. Clean the drain line and ensure water can flow freely from the indoor unit.
Why is my Haier air conditioner displaying error codes?
Error codes may indicate sensor faults, communication issues, fan problems, or refrigerant system protection. Reset the unit and refer to the specific error code troubleshooting guide if the code returns.
Important: If the error code continues after troubleshooting, disconnect power immediately and contact a certified GE technician.