Air Source Heat Pump Repair

What air source heat pump repair covers

A repair visit is designed to find the cause of the problem, fix what can be fixed safely on the day, and confirm the system is operating correctly before leaving.

• Investigation of error codes, lockouts, and intermittent faults
• Electrical and control checks, including sensors, wiring, and safety devices
• Hydronic checks, including pumps, valves, strainers, and system pressure
• Performance checks across heating and hot water, including flow temperatures and defrost behaviour
• Checks for poor heat output, overheating, freezing issues, or short cycling
• Identification of leaks, blockages, air in the system, or circulation problems
• Clear explanation of findings, options, and recommended next steps

When this service is most useful

This service is a good fit if your heat pump:

• Stops and starts with fault codes or keeps locking out
• Runs but does not heat the property or cylinder properly
• Has reduced efficiency or higher bills without a clear reason
• Makes new or louder noises from the outdoor or indoor unit
• Struggles in cold weather or is stuck in frequent defrost cycles
• Has low pressure, frequent topping up, or uneven heating

What happens during the repair

You can expect a methodical approach that prioritises safety, accurate diagnosis, and minimal disruption.

1. Initial questions about symptoms, recent changes, and controls settings.
2. Visual checks and safety isolation where required.
3. Targeted diagnostics on electrics, controls, and water side performance.
4. Confirmation of the fault and a clear explanation of repair options.
5. Repair or component replacement where appropriate and available.
6. Functional testing and checks to confirm stable operation.

If parts are needed, you will be advised on lead times and the next visit plan.

After the repair: proving performance and preventing repeat issues

Once the fault is resolved, the system should be checked and left set up for stable, efficient running.

• Confirmation of correct operation across heating and hot water
• Practical advice on controls, temperatures, and user settings
• Notes on any underlying causes, such as system balancing or circulation issues
• Recommendations for servicing or optimisation if it will improve reliability and efficiency