Heat Pump Error Codes
The heat pump controller or display showing an error or fault code, and the system stopping or reducing output.
What Is Causing This?
- 1Sensor fault giving incorrect readings
- 2Communication error between indoor and outdoor units
- 3Safety shutdown triggered by a detected fault
How Urgent Is This?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
What Needs to Be Done
A heat pump engineer will read the error code, diagnose the underlying fault, and carry out the necessary repair. They will clear the code and test the system.
How Much Will It Cost?
National average estimate
Labour: £2,033 – £5,083 | Materials: £4,000 – £10,017
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionHow to Prevent This
Note error codes when they appear to help the engineer diagnose. Have the system serviced annually. Keep the controller manual accessible for reference.
Related Problems
Other Heat Pump Installer Problems
The heat pump is running but not producing enough heat to warm the house or hot water.
The heat pump outdoor unit producing excessive vibration, buzzing, rattling, or humming.
Heavy ice or frost forming on the outdoor heat pump unit, particularly on the coils, that does not defrost.
Rooms not getting up to the temperature set on the thermostat, even after the heat pump runs for a long time.