Haier Air Conditioners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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C1
Indoor unit displays C1 and may not respond correctly to remote control temperature settings.
Wired Controller / Communication Error (where fitted)
E0
Indoor unit displays E0 and the air conditioner will not start or stops shortly after starting.
EEPROM Parameter Error / Indoor PCB Configuration Fault
E1
Indoor unit displays E1 and the unit stops cooling or heating; may attempt to start and then shut down.
High-Pressure Protection / Refrigerant System Overpressure
E2
Indoor unit shows E2 and the evaporator may freeze or unit stops after short operation.
Evaporator Anti-freeze Protection / Low Evaporator Temperature
E3
Indoor display shows E3 and the unit stops cooling or heating; may run briefly then shut down.
Low-Pressure Protection / Refrigerant Undercharge or Flow Restriction
E4
Indoor unit displays E4 and the unit stops; may occur during heating mode on heat pump models.
Compressor Discharge Overheat / High Discharge Temperature Protection
E5
Indoor unit shows E5 and the compressor does not start or stops quickly; sometimes accompanied by humming from outdoor unit.
Overcurrent Protection / Compressor Overload
E6
Indoor unit displays E6 and the system does not respond properly; compressor and outdoor fan may not start.
Communication Failure Between Indoor and Outdoor Units
E7
Indoor unit shows E7 and the system may not operate in the selected mode or may shut down.
Mode Conflict / Indoor-Outdoor Mode Mismatch
E8
Indoor unit displays E8 and the unit may stop with poor cooling or heating performance.
Indoor Fan Motor Overload / Fan Protection
E9
Indoor unit shows E9 and may stop operation; sometimes associated with water leakage or defrost issues.
Water Overflow Protection / Full Drain Pan
F0
Indoor unit displays F0 and the unit may not cool or heat properly.
Refrigerant Leakage Protection / Low Refrigerant Charge
F1
Indoor unit shows F1 and may stop or run erratically; temperature control is inaccurate.
Indoor Ambient Temperature Sensor (Room Sensor) Fault
F2
Indoor unit displays F2 and may shut down or fail to regulate coil temperature correctly.
Indoor Evaporator Coil Temperature Sensor Fault
F3
Indoor unit shows F3 and may stop heating or cooling; outdoor unit may not start.
Outdoor Ambient Temperature Sensor Fault
F4
Indoor unit displays F4 and the system may shut down or fail to heat/cool properly.
Outdoor Condenser Coil Temperature Sensor Fault
F5
Indoor unit shows F5 and the unit may stop or run with poor performance, especially in heating mode.
Outdoor Discharge Pipe Temperature Sensor Fault
F6
Indoor unit displays F6 and the outdoor fan may not operate correctly; unit may overheat or underperform.
Outdoor Fan Motor Fault / Feedback Error
F7
Indoor unit shows F7 and the compressor may not start or may shut down quickly.
Compressor Position / Inverter Module Fault (DC Inverter Models)
F8
Indoor unit displays F8 and the unit may stop or run at reduced capacity.
Indoor Fan Speed Feedback Fault
F9
Indoor unit shows F9 and may not control temperature correctly; defrost or protection cycles may be abnormal.
Indoor-Outdoor Coil Temperature Difference Abnormal / Sensor Correlation Error
H1
Display shows H1 and the unit does not blow warm air in heating mode; outdoor unit may frost up.
Defrosting / Preheating Indication (Not Always a Fault)
H3
Indoor unit displays H3 and the compressor stops; unit will not cool or heat.
Compressor Overload Protection / Overheat
H5
Indoor unit shows H5 and the outdoor unit does not start; no cooling or heating.
IPM (Inverter Power Module) Protection
H6
Indoor unit displays H6 and the indoor fan does not run or runs erratically.
Indoor Fan Motor Fault / Stall Protection
H7
Indoor unit shows H7 and the compressor does not start or runs abnormally.
Compressor Motor Position / Phase Error (Inverter Models)
P0
Indoor unit shows P0 and the compressor does not start or stops quickly.
DC Bus Voltage Protection / Inverter Power Supply Fault
P1
Indoor unit displays P1 and the unit may not start or may shut down unexpectedly.
Low Voltage Protection / Power Supply Under-Voltage
P2
Portable Haier AC displays P2 and stops cooling; water full indicator may be on.
Condensate Tank Full / High Water Level Protection (Portable Units)
P3
Portable or window Haier AC shows P3 and may stop or run at reduced capacity.
Evaporator Coil High Temperature / Overheat Protection
P4
Indoor unit displays P4 and the compressor may not run; unit may shut down.
Inverter Module Overheat / IPM Temperature Protection
Symptom
Air conditioner runs but does not cool the room effectively; supply air feels only slightly cool.
Insufficient Cooling Capacity / Performance Degradation
Symptom
Burning or electrical smell from indoor or outdoor unit during operation.
Overheating Electrical Component / Insulation Failure
Symptom
Frost or ice forming on the indoor evaporator coil or on the suction line.
Evaporator Icing / Low Coil Temperature
Symptom
Indoor unit blows air but airflow is very weak even at high fan speed.
Restricted Airflow / Fan Performance Issue
Symptom
Indoor unit emits a musty or moldy smell when starting up.
Biological Growth on Evaporator and Drain Pan
Symptom
Indoor unit powers on but compressor and outdoor fan never start; only fan mode works.
Outdoor Unit Not Starting / Control Signal Failure
Symptom
Loud grinding or squealing noise from the outdoor unit when running.
Outdoor Fan or Compressor Mechanical Failure
Symptom
Loud rattling or buzzing noise from the indoor unit during operation.
Indoor Mechanical Noise / Vibration
Symptom
Outdoor unit coil heavily frosts over in heating mode and unit stops heating frequently.
Outdoor Coil Icing / Defrost System Issue
Symptom
Outdoor unit runs but indoor unit does not blow air (no indoor fan operation).
Indoor Fan Non-Operation
Symptom
Remote control does not operate the Haier air conditioner; no response from indoor unit.
Remote Control Communication Failure
Symptom
Unit does not power on at all; no lights or display on indoor unit.
No Power / Main Supply Failure
Symptom
Unit frequently turns on and off (short cycling) without reaching set temperature.
Short Cycling / Control or Capacity Mismatch
Symptom
Unit trips the circuit breaker immediately or shortly after starting.
Overcurrent / Short Circuit
Symptom
Water dripping from the front of the indoor unit or from the air outlet onto the floor.
Indoor Water Leakage / Condensate Drainage Failure
Symptom
Water leaking from the outdoor unit or excessive water pooling around it.
Outdoor Condensate / Defrost Water Drainage Issue
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| C1 |
Indoor unit displays C1 and may not respond correctly to remote control temperature settings.
|
Wired Controller / Communication Error (where fitted) | View Details |
| E0 |
Indoor unit displays E0 and the air conditioner will not start or stops shortly after starting.
|
EEPROM Parameter Error / Indoor PCB Configuration Fault | View Details |
| E1 |
Indoor unit displays E1 and the unit stops cooling or heating; may attempt to start and then shut down.
|
High-Pressure Protection / Refrigerant System Overpressure | View Details |
| E2 |
Indoor unit shows E2 and the evaporator may freeze or unit stops after short operation.
|
Evaporator Anti-freeze Protection / Low Evaporator Temperature | View Details |
| E3 |
Indoor display shows E3 and the unit stops cooling or heating; may run briefly then shut down.
|
Low-Pressure Protection / Refrigerant Undercharge or Flow Restriction | View Details |
| E4 |
Indoor unit displays E4 and the unit stops; may occur during heating mode on heat pump models.
|
Compressor Discharge Overheat / High Discharge Temperature Protection | View Details |
| E5 |
Indoor unit shows E5 and the compressor does not start or stops quickly; sometimes accompanied by humming from outdoor unit.
|
Overcurrent Protection / Compressor Overload | View Details |
| E6 |
Indoor unit displays E6 and the system does not respond properly; compressor and outdoor fan may not start.
|
Communication Failure Between Indoor and Outdoor Units | View Details |
| E7 |
Indoor unit shows E7 and the system may not operate in the selected mode or may shut down.
|
Mode Conflict / Indoor-Outdoor Mode Mismatch | View Details |
| E8 |
Indoor unit displays E8 and the unit may stop with poor cooling or heating performance.
|
Indoor Fan Motor Overload / Fan Protection | View Details |
| E9 |
Indoor unit shows E9 and may stop operation; sometimes associated with water leakage or defrost issues.
|
Water Overflow Protection / Full Drain Pan | View Details |
| F0 |
Indoor unit displays F0 and the unit may not cool or heat properly.
|
Refrigerant Leakage Protection / Low Refrigerant Charge | View Details |
| F1 |
Indoor unit shows F1 and may stop or run erratically; temperature control is inaccurate.
|
Indoor Ambient Temperature Sensor (Room Sensor) Fault | View Details |
| F2 |
Indoor unit displays F2 and may shut down or fail to regulate coil temperature correctly.
|
Indoor Evaporator Coil Temperature Sensor Fault | View Details |
| F3 |
Indoor unit shows F3 and may stop heating or cooling; outdoor unit may not start.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| F4 |
Indoor unit displays F4 and the system may shut down or fail to heat/cool properly.
|
Outdoor Condenser Coil Temperature Sensor Fault | View Details |
| F5 |
Indoor unit shows F5 and the unit may stop or run with poor performance, especially in heating mode.
|
Outdoor Discharge Pipe Temperature Sensor Fault | View Details |
| F6 |
Indoor unit displays F6 and the outdoor fan may not operate correctly; unit may overheat or underperform.
|
Outdoor Fan Motor Fault / Feedback Error | View Details |
| F7 |
Indoor unit shows F7 and the compressor may not start or may shut down quickly.
|
Compressor Position / Inverter Module Fault (DC Inverter Models) | View Details |
| F8 |
Indoor unit displays F8 and the unit may stop or run at reduced capacity.
|
Indoor Fan Speed Feedback Fault | View Details |
| F9 |
Indoor unit shows F9 and may not control temperature correctly; defrost or protection cycles may be abnormal.
|
Indoor-Outdoor Coil Temperature Difference Abnormal / Sensor Correlation Error | View Details |
| H1 |
Display shows H1 and the unit does not blow warm air in heating mode; outdoor unit may frost up.
|
Defrosting / Preheating Indication (Not Always a Fault) | View Details |
| H3 |
Indoor unit displays H3 and the compressor stops; unit will not cool or heat.
|
Compressor Overload Protection / Overheat | View Details |
| H5 |
Indoor unit shows H5 and the outdoor unit does not start; no cooling or heating.
|
IPM (Inverter Power Module) Protection | View Details |
| H6 |
Indoor unit displays H6 and the indoor fan does not run or runs erratically.
|
Indoor Fan Motor Fault / Stall Protection | View Details |
| H7 |
Indoor unit shows H7 and the compressor does not start or runs abnormally.
|
Compressor Motor Position / Phase Error (Inverter Models) | View Details |
| P0 |
Indoor unit shows P0 and the compressor does not start or stops quickly.
|
DC Bus Voltage Protection / Inverter Power Supply Fault | View Details |
| P1 |
Indoor unit displays P1 and the unit may not start or may shut down unexpectedly.
|
Low Voltage Protection / Power Supply Under-Voltage | View Details |
| P2 |
Portable Haier AC displays P2 and stops cooling; water full indicator may be on.
|
Condensate Tank Full / High Water Level Protection (Portable Units) | View Details |
| P3 |
Portable or window Haier AC shows P3 and may stop or run at reduced capacity.
|
Evaporator Coil High Temperature / Overheat Protection | View Details |
| P4 |
Indoor unit displays P4 and the compressor may not run; unit may shut down.
|
Inverter Module Overheat / IPM Temperature Protection | View Details |
| – |
Air conditioner runs but does not cool the room effectively; supply air feels only slightly cool.
|
Insufficient Cooling Capacity / Performance Degradation | View Details |
| – |
Burning or electrical smell from indoor or outdoor unit during operation.
|
Overheating Electrical Component / Insulation Failure | View Details |
| – |
Frost or ice forming on the indoor evaporator coil or on the suction line.
|
Evaporator Icing / Low Coil Temperature | View Details |
| – |
Indoor unit blows air but airflow is very weak even at high fan speed.
|
Restricted Airflow / Fan Performance Issue | View Details |
| – |
Indoor unit emits a musty or moldy smell when starting up.
|
Biological Growth on Evaporator and Drain Pan | View Details |
| – |
Indoor unit powers on but compressor and outdoor fan never start; only fan mode works.
|
Outdoor Unit Not Starting / Control Signal Failure | View Details |
| – |
Loud grinding or squealing noise from the outdoor unit when running.
|
Outdoor Fan or Compressor Mechanical Failure | View Details |
| – |
Loud rattling or buzzing noise from the indoor unit during operation.
|
Indoor Mechanical Noise / Vibration | View Details |
| – |
Outdoor unit coil heavily frosts over in heating mode and unit stops heating frequently.
|
Outdoor Coil Icing / Defrost System Issue | View Details |
| – |
Outdoor unit runs but indoor unit does not blow air (no indoor fan operation).
|
Indoor Fan Non-Operation | View Details |
| – |
Remote control does not operate the Haier air conditioner; no response from indoor unit.
|
Remote Control Communication Failure | View Details |
| – |
Unit does not power on at all; no lights or display on indoor unit.
|
No Power / Main Supply Failure | View Details |
| – |
Unit frequently turns on and off (short cycling) without reaching set temperature.
|
Short Cycling / Control or Capacity Mismatch | View Details |
| – |
Unit trips the circuit breaker immediately or shortly after starting.
|
Overcurrent / Short Circuit | View Details |
| – |
Water dripping from the front of the indoor unit or from the air outlet onto the floor.
|
Indoor Water Leakage / Condensate Drainage Failure | View Details |
| – |
Water leaking from the outdoor unit or excessive water pooling around it.
|
Outdoor Condensate / Defrost Water Drainage Issue | View Details |
No matching codes found
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