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Remeha heat pump error codes – Heat pump outdoor unit
Heat pump fault codes

Remeha heat pump faults: fault codes, causes and parts

All 76 fault codes for Remeha heat pumps, plus the faults that show no code. Type your code or choose your symptom.

In brief

A fault on a Remeha heat pump usually means that the appliance has locked out or is reporting a fault code. Note the code on the display and look it up below: for each code you will find its meaning, checks you can safely do yourself and the parts that are often checked or replaced. Frequently searched: H06.01 (heat pump fault occurred), H02.07 (water pressure error active), E02.24 (system flow lockout). No code? Check the power supply, the settings and the filters, and reset once. If the fault comes back, call in a qualified professional.

Most searched Remeha faults

These are the codes that visitors to this site search for most often.

See the 25 most searched fault codes of 2026, with the figures behind them →

Remeha heat pump faults without a code on the display

Not every fault shows a code. These are the symptoms we come across most often with Remeha appliances, with what you can check yourself before calling someone out.

Heat pump no longer produces heat

Check that the system has enough pressure and whether there is a message on the display or in the app. After a power cut, some units start up in a safe mode and have to be released manually. View the matching parts → Read also: heat pump freezes or defrosts constantly →

Outdoor unit freezes or defrosts constantly

A thin layer of ice in frosty weather is normal; the unit defrosts itself periodically. If the ice stays or the unit defrosts every few minutes, the airflow is obstructed or something is wrong with the defrost control. View the matching parts → Read also: heat pump freezes or defrosts constantly →

Too little or too cold hot water

Check the set hot water temperature and whether the electric immersion heater is enabled. A sharp drop in hot water capacity often points to a faulty cylinder sensor or a worn anode in the tank. View the matching parts → Read also: replace the anode before the tank fails →

Noise or vibrations

A noticeably louder noise than normal usually comes from the fan or from vibrations carried through the pipework. Check that the unit stands clear and that the anti-vibration mounts are intact. View the matching parts → Read also: noise and ice on the outdoor unit →

All 76 Remeha heat pump fault codes

CodeCause
E00.00The flow temperature sensor has been removed or measures a temperature below the range:
E00.01Flow temperature sensor short-circuited or above range
E02.13Blocking input of the control unit due to outdoor environment of the appliance:
E02.13Blocking input of the control unit due to outdoor environment of the unit:
E02.24System flow lockout
H00.00Flow temperature sensor open
H00.01Flow temperature sensor short-circuited
H00.16The DHW tank temperature sensor has been removed or measures a temperature below the range:
H00.17The DHW tank temperature sensor is short-circuited or measures a temperature above the range:
H00.32The outdoor temperature sensor has been removed or measures a temperature below the range:
H00.33The outdoor temperature sensor is short-circuited or measures a temperature above the range:
H00.34Outdoor temperature sensor was expected but not detected:
H00.40The water pressure sensor has been removed or measures a pressure below the range:
H00.41The water pressure sensor is short-circuited or measures a temperature above the range:
H00.47The heat pump flow temperature sensor has been removed or measures a temperature below the range:
H00.47The heat pump flow temperature sensor has been removed or measures a temperature below the range:
H00.48The heat pump flow temperature sensor is short-circuited or measures a temperature above the range:
H00.48The heat pump flow temperature sensor is short-circuited or measures a temperature above the range:
H00.48The heat pump return temperature sensor is short-circuited or measures a temperature above the range:
H00.49Heat pump flow temperature sensor was expected but not detected:
H00.51The heat pump return temperature sensor has been removed or measures a temperature below the range:
H00.52The heat pump return temperature sensor is short-circuited or measures a temperature above the range:
H00.57The upper DHW temperature sensor has been removed or measures a temperature below the range:
H00.58The upper DHW temperature sensor is short-circuited or measures a temperature above the range:
H00.79The pool sensor has been removed or measures a temperature below the range:
H00.80The pool sensor is short-circuited or measures a temperature above the range:
H00.81Room temperature missing:
H02.02Waiting for configuration number:
H02.03Configuration error:
H02.04Parameter error:
H02.05CSU does not match CU type:
H02.07Water pressure error active:
H02.09Partial blockage of the appliance detected:
H02.09Partial blockage:
H02.10Complete blockage of the appliance detected:
H02.10Complete blockage:
H02.23System water flow error active
H02.25ACI error
H02.36Functional device is disconnected
H02.36Functional component missing
H02.37Non-critical component missing
H02.37Non-critical device is disconnected
H02.56The OpenTherm interface was operational but has stopped working:
H02.60The selected function is not supported by the group:
H02.60Unsupported function:
H02.71The ModBus interface was operating but has stopped correctly:
H06.01Heat pump fault occurred
H06.01Heat pump unit defective
H06.02Block hydraulic auxiliary heaters:
H06.06BL compressor high pressure:
H06.07BL compressor low pressure:
H06.21Heat pump return temperature sensor error:
H06.22Heating error:
H06.23Refrigerant pressure sensor error:
H06.24Refrigerant high pressure:
H06.25Heat pump flow temperature sensor error:
H06.25Heat pump flow temperature sensor error:
H06.26Heat pump liquid temperature sensor error:
H06.27Frost protection:
H06.28Communication fault between the indoor unit and outdoor unit:
H06.29Outdoor unit interface:
H06.30Outdoor unit temperature:
H06.31Outdoor unit temperature sensor error:
H06.32Outdoor unit temperature sensor error:
H06.33Outdoor unit heat sink temperature:
H06.34Outdoor unit power module:
H06.35Outdoor unit overheated:
H06.36Fan motor:
H06.37Overheating protection:
H06.38Outdoor unit pressure:
H06.39Outdoor unit overcurrent:
H06.40Outdoor unit current sensor:
H06.41Outdoor unit water inlet temperature:
H06.41Outdoor unit current sensor error:
H06.42Outdoor unit refrigerant:
H06.43DIP switch:

Order parts for your Remeha heat pump

Remeha parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.

Parts per Remeha-series: Tzerra Ace · Tzerra · Avanta Ace · Avanta · Calenta Ace · Calenta · Quinta Ace · Quinta.

View Remeha parts →

Frequently asked questions about Remeha faults

What does a fault on a Remeha heat pump mean?

The appliance is reporting that it has shut itself down or cannot continue. The code on the display points to the group of causes: ignition, water pressure, a sensor, the fan or communication with the thermostat. The table above shows, for each code, what Remeha means by it.

How do I reset my Remeha heat pump?

The reset button is on the control panel of your Remeha heat pump; on most appliances you hold it down for two to five seconds until the display responds. Reset once. If the same fault comes straight back, resetting will not solve it and a part or a setting needs attention. Always consult the manual for your model: the position of the button and how long to press it differ per series.

Can I fix a Remeha fault myself?

You can top up the water pressure, bleed the system, replace filters and clean a siphon yourself. Anything behind the sealed section of a gas appliance is a different matter: work on the gas valve, burner, heat exchanger and flue must be carried out by a certified gas engineer.

How much does it cost to fix a fault?

That depends on the cause and whether a part is needed. With us you can see the part straight away with its price and delivery time, so you know where you stand in advance. If you call in an engineer, always ask about the call-out charge and hourly rate before they come.

Where can I find the right part for my Remeha?

Check the rating plate for the exact type and use it to search our catalogue, or search directly by the manufacturer number of the faulty part. Each part lists the appliances it fits.

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