What does your Haier fault code mean?
Pick the code showing on your remote, wall controller or indoor unit and see what it means, what commonly causes it, and what is safe to check yourself. This page covers 79 Haier fault codes for units sold in Australia, compiled from official Australian manufacturer and distributor documentation, the same references our own technicians carry.
Heads up: Haier uses the same code with different meanings on different product ranges, so check the model range shown next to the code.
Every Haier fault code at a glance
Some models show faults as a flashing-light pattern instead of a code; documented lamp patterns are listed alongside their codes.
| Code | What it means | Severity |
|---|---|---|
| 01 (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The indoor unit’s room air temperature sensor has failed. | Fault – service needed |
| 02 (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The indoor unit’s coil temperature sensor has failed. | Fault – service needed |
| 04 (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The indoor unit’s memory chip (EEPROM) has failed or lost its settings. | Fault – service needed |
| 07 (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The indoor and outdoor units have stopped talking to each other. | Fault – service needed |
| 08 (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The wall controller (or receiver panel) has stopped talking to the indoor unit. | Fault – service needed |
| 0C (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The condensate drain system has a fault, so the unit has stopped to avoid a water overflow. | Fault – service needed |
| 0D (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The indoor unit cannot read the incoming mains power wave properly. | Fault – service needed |
| 0E (Smart Power cassette systems (indoor units ABH071H1ERG, ABH90H1ERG, ABH105H1ERG, ABH125K1ERG, ABH140K1ERG) and Smart Power ducted indoor units of the same ERG generation; code shows on the cassette panel display or the wired wall controller) | The indoor fan motor has stopped working properly. | Fault – service needed |
| 0E (Smart Power ducted systems with medium static indoor units ADH071M1ERG to ADH140M1ERG (earlier ERG generation); code shows on the wired wall controller) | The indoor unit’s main board has lost contact with the fan motor’s drive. | Fault – service needed |
| 0F (Smart Power ducted systems with medium static indoor units ADH071M1ERG to ADH140M1ERG (earlier ERG generation); code shows on the wired wall controller) | The indoor fan motor is drawing too much current. | Fault – service needed |
| 1 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor unit’s memory chip (EEPROM) is damaged or its data is corrupted. | Fault – service needed |
| 10 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor defrost temperature sensor is giving impossible readings. The 1U71S2SS5FA table calls this the outdoor piping sensor; the 1U100 to 1U180 tables call it the defrost sensor Te. | Fault – service needed |
| 11 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The suction temperature sensor is giving impossible readings. | Fault – service needed |
| 11 (Smart Power ducted systems with medium static indoor units ADH071M1ERG to ADH140M1ERG (earlier ERG generation); code shows on the wired wall controller) | The power voltage inside the indoor fan motor’s driver is too high or too low. | Fault – service needed |
| 12 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor air temperature sensor is giving impossible readings. | Fault – service needed |
| 12 (Smart Power ducted systems with medium static indoor units ADH071M1ERG to ADH140M1ERG (earlier ERG generation); code shows on the wired wall controller) | The indoor fan motor’s driver has overheated. | Fault – service needed |
| 13 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The compressor discharge temperature sensor is giving impossible readings. | Fault – service needed |
| 13 (Smart Power ducted systems with medium static indoor units ADH071M1ERG to ADH140M1ERG (earlier ERG generation); code shows on the wired wall controller) | The indoor fan motor has lost its correct running position and cannot spin properly. | Fault – service needed |
| 14 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | Too much voltage was detected in the outdoor unit’s power correction circuit. | Fault – service needed |
| 15 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor unit has lost communication with the indoor unit. | Fault – service needed |
| 16 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The system is low on refrigerant or the discharge pipe is blocked. | Urgent – turn it off |
| 17 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The reversing valve that switches between heating and cooling is not changing over properly. | Fault – service needed |
| 18 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The compressor motor has lost synchronisation with its drive. | Fault – service needed |
| 18 (Smart Power high static ducted systems with the 1U71S2SS5FA outdoor unit (7.1 kW); code is read as the number of LED flashes on the outdoor unit’s circuit board) | The compressor is jammed and cannot turn. | Fault – service needed |
| 19 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The incoming voltage to the outdoor unit is too low. | Fault – service needed |
| 19 (Smart Power high static ducted systems with the 1U71S2SS5FA outdoor unit (7.1 kW); code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor unit’s drive module has a fault in one of its internal control circuits, so it cannot drive the compressor properly. | Fault – service needed |
| 2 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor power module has detected a current overload and shut the unit down. | Fault – service needed |
| 20 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The indoor coil got too hot in heating and the unit paused to protect itself. | Minor fault |
| 21 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The indoor coil got too cold and the unit paused to stop it icing up. | Minor fault |
| 22 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | Too much current was detected in the outdoor unit’s power correction circuit. | Fault – service needed |
| 23 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The compressor drive module overheated above 90 degrees. | Fault – service needed |
| 24 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The compressor failed to start. | Fault – service needed |
| 24 (Smart Power high static ducted systems with the 1U71S2SS5FA outdoor unit (7.1 kW); code is read as the number of LED flashes on the outdoor unit’s circuit board) | The compressor drew a sudden spike of current and the unit shut it down to protect it. | Fault – service needed |
| 25 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The compressor drive module’s input current went over its limit. | Fault – service needed |
| 25 (Smart Power high static ducted systems with the 1U71S2SS5FA outdoor unit (7.1 kW); code is read as the number of LED flashes on the outdoor unit’s circuit board) | One phase of the compressor motor is drawing too much current. | Fault – service needed |
| 26 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | One phase of the three phase power supply to the drive module is missing. | Fault – service needed |
| 27 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The circuit that measures the drive module’s input current has failed. | Fault – service needed |
| 28 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The outdoor unit cannot detect any wiring between the compressor and its drive module. | Fault – service needed |
| 3 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The compressor drew too much current while slowing down. | Fault – service needed |
| 3 (Smart Power high static ducted systems with the 1U71S2SS5FA outdoor unit (7.1 kW); code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor unit has detected too much current on its incoming mains supply and has shut down to protect itself. | Fault – service needed |
| 37 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The compressor drive module has detected too much current in one of the compressor’s phases. | Fault – service needed |
| 38 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The drive module’s own temperature sensor is giving impossible readings. | Fault – service needed |
| 39 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The mid coil temperature sensor on the outdoor unit is giving impossible readings. | Fault – service needed |
| 4 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor control board has lost communication with the compressor drive module. | Fault – service needed |
| 42 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The high pressure safety switch has tripped or failed. | Urgent – turn it off |
| 43 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The low pressure safety switch has tripped or failed. | Urgent – turn it off |
| 44 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The outdoor coil got too hot and the unit shut down to protect itself. | Fault – service needed |
| 45 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The system pressure has dropped too low and the unit shut down to protect itself. | Urgent – turn it off |
| 5 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The control board has detected the compressor drawing too much current. | Fault – service needed |
| 6 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The incoming voltage to the outdoor unit is too high. | Fault – service needed |
| 6 (Smart Power high static ducted systems with the 1U71S2SS5FA outdoor unit (7.1 kW); code is read as the number of LED flashes on the outdoor unit’s circuit board) | The power supply voltage to the outdoor unit’s drive module is too high or too low. | Fault – service needed |
| 7 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller) | The circuit that measures compressor current has failed. | Fault – service needed |
| 8 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The compressor’s discharge temperature got dangerously hot (over 115 degrees on the 1U100 to 1U180 outdoor units, over 110 degrees on the 1U71S2SS5FA) and the unit shut down to protect itself. | Urgent – turn it off |
| 9 (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board) | The outdoor fan motor has failed or is not connected. | Fault – service needed |
| E1 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models)) | The room temperature sensor has failed, so the unit cannot read the room temperature properly. | Fault – service needed |
| E14 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models)) | The indoor fan motor has stopped working properly. | Fault – service needed |
| E2 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models)) | The indoor coil temperature sensor has failed, so the unit cannot monitor its own heat exchanger. | Fault – service needed |
| E4 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models)) | The indoor unit’s memory chip (EEPROM) has failed or lost its settings. | Fault – service needed |
| E7 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models)) | The indoor and outdoor units have stopped talking to each other. | Fault – service needed |
| F1 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor unit’s inverter power module has shut down to protect itself. | Fault – service needed |
| F11 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The compressor is not running the way the outdoor unit expects. | Fault – service needed |
| F12 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor unit’s memory chip (EEPROM) has failed or lost its settings. | Fault – service needed |
| F13 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The system has detected it is low on refrigerant gas. | Fault – service needed |
| F14 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The reversing valve that switches between heating and cooling is not changing over properly. | Fault – service needed |
| F19 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The incoming power voltage is too high or too low for the unit to run safely. | Fault – service needed |
| F2 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The compressor is drawing too much current and the unit has shut down to protect it. | Fault – service needed |
| F20 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The compressor has overloaded and the unit has shut down to protect it. | Urgent – turn it off |
| F21 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor defrost temperature sensor has failed. | Fault – service needed |
| F22 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor unit has detected too much incoming electrical current and shut down to protect itself. | Fault – service needed |
| F23 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | One phase of the compressor motor is drawing too much current. | Fault – service needed |
| F25 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The compressor discharge temperature sensor has failed. On some models F25 can also show normally while the self clean function runs in near freezing weather. | Fault – service needed |
| F27 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The compressor is jammed and cannot turn. | Urgent – turn it off |
| F28 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor unit has detected a fault in the circuit that tracks the compressor motor’s position. | Fault – service needed |
| F3 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | Communication has failed between the outdoor unit’s power module and its main circuit board. | Fault – service needed |
| F30 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The refrigerant gas returning to the compressor is running too hot. | Fault – service needed |
| F4 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The compressor’s discharge temperature got too hot and the unit shut down to protect itself. | Fault – service needed |
| F6 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor air temperature sensor has failed. | Fault – service needed |
| F7 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor suction temperature sensor has failed. | Fault – service needed |
| F8 (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display) | The outdoor fan motor has stopped working properly. | Fault – service needed |
Codes that mean switch the system off
If your Haier unit shows F20, F27, 8, 16, 42, 43, 45, turn the system off at the isolator and leave it off. These faults involve the compressor, refrigerant or electrical protection, and running the unit can cause further damage.
The most serious Haier fault codes explained
What does Haier fault code F20 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display)
The compressor has overloaded and the unit has shut down to protect it.
Likely causes:
- Poor airflow over the outdoor unit
- Refrigerant system problem
- Compressor wearing out
Safe checks before you call:
- Check the outdoor unit is not blocked by leaves, plants or debris (look only, do not open the unit)
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
What does Haier fault code F27 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models); outdoor unit fault shown on the indoor display)
The compressor is jammed and cannot turn.
Likely causes:
- Seized or mechanically blocked compressor
- Compressor electrical fault
Safe checks before you call:
- Turn the system off at the isolator or breaker and leave it off until it has been inspected
What does Haier fault code 8 mean? (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board)
The compressor’s discharge temperature got dangerously hot (over 115 degrees on the 1U100 to 1U180 outdoor units, over 110 degrees on the 1U71S2SS5FA) and the unit shut down to protect itself.
Likely causes:
- Poor airflow over the outdoor unit
- Low refrigerant
- Blocked refrigerant circuit
Safe checks before you call:
- Check the outdoor unit is not blocked by leaves, plants or debris (look only, do not open the unit)
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
What does Haier fault code 16 mean? (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller; also applies to the 1U71S2SS5FA (7.1 kW) high static ducted outdoor unit, where the code is read as the number of LED flashes on the outdoor unit’s circuit board)
The system is low on refrigerant or the discharge pipe is blocked.
Likely causes:
- Refrigerant leak
- Blocked refrigerant pipework
- System undercharged at installation
Safe checks before you call:
- Turn the system off and book a service call; low refrigerant will not fix itself
What does Haier fault code 42 mean? (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller)
The high pressure safety switch has tripped or failed.
Likely causes:
- Poor airflow over the outdoor unit
- Overcharged or blocked refrigerant circuit
- Faulty pressure switch
Safe checks before you call:
- Check the outdoor unit is not blocked by leaves, plants or debris (look only, do not open the unit)
- Turn the system off at the isolator or breaker and book a service call if the code returns
What does Haier fault code 43 mean? (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller)
The low pressure safety switch has tripped or failed.
Likely causes:
- Refrigerant leak
- Blocked refrigerant circuit
- Faulty pressure switch
Safe checks before you call:
- Turn the system off at the isolator or breaker and book a service call
What does Haier fault code 45 mean? (Smart Power high static ducted systems (outdoor units 1U100S2SN5FA to 1U180S2SP5FA); code shows on the outdoor board LED and can also be read from the indoor wall controller)
The system pressure has dropped too low and the unit shut down to protect itself.
Likely causes:
- Refrigerant leak
- Very low refrigerant charge
Safe checks before you call:
- Turn the system off at the isolator or breaker and book a service call
What does Haier fault code E1 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models))
The room temperature sensor has failed, so the unit cannot read the room temperature properly.
Likely causes:
- Sensor connector has worked loose on the indoor circuit board
- Room temperature sensor open or short circuit
- Indoor circuit board fault
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
What does Haier fault code E2 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models))
The indoor coil temperature sensor has failed, so the unit cannot monitor its own heat exchanger.
Likely causes:
- Coil sensor connector loose
- Indoor pipe sensor open or short circuit
- Indoor circuit board fault
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
What does Haier fault code E4 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models))
The indoor unit’s memory chip (EEPROM) has failed or lost its settings.
Likely causes:
- Corrupted data on the indoor circuit board after a power surge or brownout
- Faulty indoor circuit board
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
What does Haier fault code E7 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models))
The indoor and outdoor units have stopped talking to each other.
Likely causes:
- Damaged or loose interconnecting cable between the indoor and outdoor units
- Power interruption to the outdoor unit
- Indoor or outdoor circuit board fault
Safe checks before you call:
- Check the outdoor unit isolator switch has not been turned off
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
What does Haier fault code E14 mean? (Hi-wall split systems (Tempo, Flexis and similar Haier hi-wall inverter models))
The indoor fan motor has stopped working properly.
Likely causes:
- Indoor fan motor fault
- Indoor circuit board fault
- Fan obstructed or seized
Safe checks before you call:
- Clean the return air filters if they are dusty
- Turn the system off at the isolator or breaker for 5 minutes, then restart it
Fault confirmed? Here is what to do next
A fault code is the starting point, not the fix. Start here:
- Air conditioner repairs – how we diagnose and fix Haier faults across Adelaide. Our fault find covers the full diagnosis, and it is on us if you go ahead with the repair.
- Repair or replace calculator – whether fixing your current system is the smarter money.
- Service and maintenance – regular servicing prevents most of the faults on this page.
- Air conditioner fault code lookup – all 15 brands in one place.
- All calculators and tools
Call us on 08 8296 7888 or book online and we will call or text you back ASAP.
Sources for this page
Every Haier code above is checked against these Australian documents. Open them yourself to verify anything on this page:
- 1U71SABFRA ServiceManual AAAHN0E6N00 (PDF) (haier.com.au)
- haier flexis aircon user guide (PDF) (haier.com.au)
- Haier UserGuide en TEMPO HVAC HHB 2023 NZ AU (PDF) (haierhome.com.au)
- Haier InstallGuide en HIGHSTATICDUCTED HVAC HHB AU NZ (PDF) (haierhome.com.au)
- Smart power service manual Australia 20181115 (PDF) (haier.com.au)
Haier fault code FAQs
Where do I find the fault code on a Haier air conditioner?
Check the remote or wall controller display first. Some models flash the indoor unit’s lamps in a pattern instead; the table above lists documented lamp patterns alongside their codes. If nothing is showing, the code may only appear while the fault is active.
Can I clear a Haier fault code myself?
You can reset the system by turning it off at the isolator or breaker for five minutes. If the code stays gone, it was a one-off. If it returns, the fault is real and needs a licensed technician, and repeated resets can cause further damage on compressor or refrigerant faults.
Does a Haier fault code mean I need a new air conditioner?
Usually not. Most codes point to repairable faults like sensors, fan motors or drainage. Our fault find gives you an honest verdict either way, and the fee is credited if you repair with us.
Are these Haier fault codes correct for Australian models?
Yes. Every code on this page was checked against Australian documentation (haier.com.au, haierhome.com.au), not overseas lists, because the same code can mean different things in different markets. Meanings still vary between model series, so treat this page as reference and cross-check your unit’s manual.
Written by Oliver Hastings, T&K Airpower. Last updated 01/08/2026. Compiled from Australian sources including haier.com.au, haierhome.com.au, so you can check every code against the official documentation. Fault code meanings vary between model series and controllers, so treat this page as reference only and never remove panels or work on the refrigeration or electrical parts of the system yourself.
