A Haier heat pump error code is a short E code, such as E08 or E15, that the system shows when a sensor, safety switch or board reports a problem. You will see it on the digital display on the outdoor unit and on the wired controller indoors. Some codes have a suffix, for example E20-0 or E71-1, which tells you which of two similar parts is affected.
These codes come from Haier's list for the R290 Super Aqua Hydro Split and Hydro All in One. Super Aqua monobloc units may differ, so check your manual. For other makes, see our guide to heat pump error codes.
A quick safety point: switch the unit off at its isolator before you look at it, and never open the casing. If a code keeps returning, or you are not sure what it means, book an engineer. We carry out Haier heat pump repairs across the UK.
Please read first: this guide is here to help you understand what your Haier heat pump is telling you. Every effort has been made to keep the information accurate, but manufacturers update their manuals and codes can differ between models and software versions, so always check the official Haier manual for changes before acting on anything here. Do not attempt anything that could be dangerous, and avoid any work that could void your warranty. If in doubt, call a qualified heat pump engineer.
If your Haier heat pump is not showing a code, or you want to rule out the basics first, our guide to troubleshooting an air source heat pump that is not working walks through the general checks and matches common faults to error codes across every major brand.
Is it safe to fix a Haier heat pump fault yourself?
Only the basic checks are safe for a homeowner; anything inside the unit needs a qualified engineer. That means reading the pressure gauge, checking valves are open, clearing debris from the outdoor unit and resetting a tripped breaker once.
Do not remove covers or touch wiring, boards or connectors, even when a code points at a sensor plug. The boards inside run at mains voltage.
Refrigerant work is restricted by law to certified engineers, with F-Gas certification covering fluorinated refrigerants. Haier's R290 models use propane, a flammable refrigerant, so the engineer also needs specific training for it. Unqualified work inside the unit can also put your warranty at risk.
Which Haier error codes can you check yourself?
A few Haier codes have a check you can safely make, mainly the water flow, frost, airflow, fan and power codes. Haier's published list has no dedicated water pressure code, so low pressure usually shows up as a flow fault.
| Code | What it means | Safe homeowner check | Stop and call an engineer if |
|---|---|---|---|
| E08 | Flow switch fault or low water flow | Check the pressure gauge and that isolation and radiator valves are open. Top up only if you have a filling loop and the manual allows it | It returns, or pressure keeps dropping |
| E15 | Anti-freeze protection | Make sure the heat pump has power and the heating is not switched off during a frost | It repeats on a normal winter day |
| E71-0, E71-1 | Upper or lower fan motor fault | Look for snow, ice or leaves blocking the fan and clear around the unit by hand | The fan is iced in or the blade looks damaged |
| E81, E112, E112-4 | Driver board or heat sink too hot | Clear anything blocking airflow around the outdoor unit | It returns with the unit clear |
| E06, E07 | Communication lost between units or with the controller | Check the heat pump breakers are on, then restart once | It comes back after the restart |
| E114, E124 | Supply voltage or three-phase supply abnormal | After a power cut, wait for the supply to settle and restart once | It persists, or other appliances are flickering |
What are the most common Haier heat pump error codes?
The Haier codes we come across most are E08 for low water flow and E15 for frost protection, followed by sensor, communication and refrigerant pressure faults. Haier's manual gives the meaning of each code but not the cause. The causes below are general engineering knowledge.
E08: flow switch fault or low water flow
Haier says the flow switch has tripped or flow is too low, confirmed after three events in an hour. General causes are a blocked strainer, closed valves, a failing pump, an air lock or sludge in an old radiator circuit.
What to do: check the valves and pressure gauge, then call an engineer to clean the strainer, bleed the system and check the pump. Sludged systems may need a heat pump powerflush, and falling pressure is covered in our guide to a heat pump losing pressure.
E15: anti-freeze fault
Haier lists this as anti-freeze protection, confirmed after three events in an hour. In general, low flow, very cold water or an unheated property triggers it, and scale on the plate heat exchanger adds to the risk.
What to do: keep the system powered through cold weather and check valves are open. Our tips on running a heat pump in cold weather help, but a repeat E15 needs a flow check by an engineer.
E87: defrosting with water temperature too low
This code means the unit tried to defrost while the water in the system was too cold. Generally it points to low flow or a very low setpoint. Our guide to the heat pump defrost cycle explains why defrost needs warm water to work.
E01 to E04, E10, E12, E17 to E19, E20 to E24 and E32: sensor faults
These are indoor and outdoor temperature sensor faults, from the water and tank sensors to the defrost coil and discharge sensors. A loose plug, damaged cable or failed sensor is the usual cause, and an engineer will test the sensor before replacing it.
E06 and E07: communication faults
E06 means the outdoor and indoor units have lost contact. E07 means the wired controller has lost contact with the indoor unit. General causes are a loose terminal, a damaged cable or electrical interference, and the wiring checks are an engineer's job.
E30, E38 and E40: high pressure faults
E30 is the high pressure switch tripping, and E40 is high pressure protection. E38 is the opposite case, where high-side pressure is too low. General causes include a blocked heat exchanger, poor water flow, scale on the water side or an incorrect refrigerant charge, so these need a refrigerant engineer.
E39-0 and E49: low pressure faults
These codes mean refrigerant pressure on the low side has dropped too far. General causes are refrigerant loss, a faulty expansion valve or an outdoor coil iced up after failed defrosts. If the unit is caked in ice, see our guide to a frozen outside unit and call us.
E71-0 and E71-1: fan motor faults
These are DC fan motor faults on the upper (E71-0) and lower (E71-1) fan. In general, ice, debris or a seized blade stops the fan, though the motor itself can fail. Clear around the unit by hand, then leave the fan to an engineer.
Which error code might you see in common situations?
What is happening around the house is often the quickest clue to the code. This table matches common situations to codes from Haier's published list.
| Situation | Codes you may see on a Haier | First check |
|---|---|---|
| Cold snap and iced outdoor unit | E15, E87, E39-0, E49, E71-0 | Let any defrost finish, then clear snow from around the unit. Never chip at ice on the fins |
| Losing pressure or low pressure | E08 | Read the gauge and look for drips at radiators and pipework |
| Radiators lukewarm | E08, E12, E16 | Check radiator and isolation valves are open |
| No hot water | E10, E68, E69 | Check the hot water schedule on the controller, then note the code |
| After a power cut | E114, E121, E124, E06 | Wait for the supply to settle, then restart once at the isolator |
| Unit noisy or fan not spinning | E71-0, E71-1, E111-4, E117-4 | Look for ice or debris around the fan without reaching inside |
| After a service or filter clean | E08, E06, E07 | Check valves were reopened and pressure was restored |
Cool radiators with no code are covered in heat pump not heating, and new rattles or hums in heat pump making noise.
How do you reset a Haier heat pump?
It depends on the type of code, because Haier splits its faults into resumable and unresumable. A resumable fault clears itself once the condition behind it goes away, so there is nothing to reset. An unresumable fault stays latched once the unit has confirmed it, often after three occurrences within an hour (four for E110).
Haier's manual does not give a homeowner reset sequence for latched faults. The safe general approach is to switch off at the isolator, wait a few minutes and switch back on. If the code returns, write it down and call an engineer.
Resetting again and again without fixing the cause is a bad idea. Latched codes such as E30, E34 and E39-0 are there to protect the compressor, and forcing it to keep running can turn a small fault into an expensive one.
Haier error code list
This list covers every code in Haier's manual for the R290 Super Aqua Hydro Split and Hydro All in One. Other Haier models may differ, so check your manual. On R290 units, "F-Gas engineer" means a certified refrigerant engineer trained to work with flammable refrigerants.
| Code | Meaning | Who should fix it |
|---|---|---|
| E01 to E04, E10, E12, E17 to E19 | Indoor water, pipe, tank, zone and pool sensor faults | Engineer |
| E05, E33 | Indoor or outdoor board memory (EEPROM) fault | Engineer |
| E06, E07 | Outdoor unit or wired controller communication error | Homeowner check, then engineer |
| E08 | Flow switch fault or low water flow | Homeowner check, then engineer |
| E09, E11 | Indoor address duplicated or I/O board communication fault | Engineer |
| E13, E14, E60 to E62, E70 | Reserved in the manual (E13 water leakage, E14 low pressure switch) | Engineer |
| E15 | Anti-freeze fault | Homeowner check, then engineer |
| E16 | Water inlet or outlet temperature too high | Engineer |
| E20-0 to E24, E32-0, E32-1, E43, E65 | Outdoor and control box temperature sensor faults | Engineer |
| E27, E34 | Oil or discharge temperature too high | F-Gas engineer |
| E28, E29 | Discharge or suction pressure sensor fault | F-Gas engineer |
| E30, E38, E40 | High pressure switch and high pressure protection | F-Gas engineer |
| E35, E36 | Four-way valve fault or oil temperature too low | F-Gas engineer |
| E39-0, E49 | Low pressure protection and low pressure switch | F-Gas engineer |
| E39-1 | Compression ratio too high | Homeowner check, then F-Gas engineer |
| E46, E116, E119, E122 | Driver board communication, current circuit or sensor fault | Engineer |
| E51-0, E51-2, E52-0, E52-2 | Expansion valve overcurrent or disconnection | Engineer |
| E53, E64, E82, E110, E117 | Current sensor and compressor current faults | Engineer |
| E54, E57 to E59 | Subcooling module communication and sensor faults | Engineer |
| E63, E83 | DIP switch setting incorrect | Engineer |
| E68, E69 | Hot water I/O board communication or tank temperature fault | Engineer |
| E71-0, E71-1 | Upper or lower fan motor fault | Homeowner check, then engineer |
| E74 | System emergency stop | Engineer |
| E81, E112, E112-4 | Driver board or heat sink too hot | Homeowner check, then engineer |
| E87 | Defrosting with water temperature too low | Engineer |
| E111, E111-4, E117-4, E118 | Compressor or fan motor synchronism, overcurrent or start-up fault | Engineer |
| E114, E121, E124 | Supply voltage, board power or three-phase supply fault | Homeowner check, then engineer |
Where can you find the official Haier manual?
Haier HVAC Europe lists the user and installation manual for the R290 Hydro Split and All in One on its product page, under User Manuals. A version of the manual is also available as a direct PDF from Haier's official distributor in Portugal.
- Haier R290 Hydro Split product page with the user and installation manual download
- Haier R290 Hydro Split and All in One manual (PDF)
Need help with a Haier heat pump fault?
We fix Haier heat pumps across the UK, including the Super Aqua range. Our engineers are F-Gas certified and we are MCS accredited, so we can deal with refrigerant faults as well as flow, sensor and wiring problems.
Every visit starts with fault diagnosis: we read the code, test the part behind it and find the cause, not just clear the alarm. Then we carry out the heat pump repair it needs, backed by our 12-month guarantee. If you are without heating or hot water, our emergency heat pump repair service offers same-day visits where possible.
A lot of the codes above, especially E08, E15 and the pressure faults, are less likely on a well-maintained system. Annual heat pump servicing keeps strainers clean and pressure where it should be, and our cover plans spread the cost.
Call 0333 041 5130 or get in touch online to book.
Frequently asked questions
Does a Haier error code void my warranty?
No, a code by itself does not affect your warranty. Problems arise when someone unqualified works inside the unit, or when required servicing has been missed. Check your warranty terms before anyone opens the casing.
Does a Haier Super Aqua monobloc use the same codes?
Not necessarily. The published list covers the R290 Super Aqua Hydro Split and Hydro All in One, and we have not found a code list for the monobloc models. If a code on your unit does not match, use your own manual or send us a photo of the display.
Does E110 or E82 mean the compressor has failed?
Not always. Current faults can come from a poor electrical supply or an overloaded compressor, not just a failing one. Our guide to heat pump compressor problems covers the signs an engineer looks for.
What should I note before calling an engineer?
Write down the full code with any suffix, such as -0 or -1, where it shows and when it started. A photo of the model label saves time on the day.
How long does a Haier heat pump repair take?
Sensor, wiring and flow faults are often sorted in one visit. If a board, fan motor or valve has to be ordered, expect a second visit. Refrigerant repairs take longer because the leak must be found and the system tested before it is recharged.
