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“Excellent service — knowledgeable team who explained the heat pump options clearly.”
Why Specialist Heat Pump Repairs Matter
- Refrigerant and electrical faults need specialist heat pump engineers
- Incorrect repairs can void warranties and reduce efficiency
- Fast diagnosis restores your heating before temperatures drop
- Genuine parts and proper procedures protect your system long-term
Common Heat Pump Faults We Repair
Whether your heat pump has lost heating or hot water, is showing an error code, running noisily or underperforming, our MCS-aware engineers diagnose and repair air source systems across all major brands — restoring reliable renewable heating as quickly as possible.
- Fault diagnosis and error codes
- Loss of heating or hot water
- Performance and efficiency issues
- Noisy outdoor units
- Frozen outdoor coils
- Refrigerant pressure faults
- Circulation pump failures
- Expansion valve and sensor faults
- Electrical and control board faults
- Defrost cycle problems
- Incorrect commissioning or settings
- Manufacturer-trained diagnostics
Don't see your issue?
Don't see your fault listed? We diagnose and repair air source heat pump faults across Berkshire.
Call us on 01635 269888 or get in touch and we'll be happy to help.
Our Heat Pump Diagnostic & Repair Process
Tell Us What Is Happening
Share the model, symptoms and any error codes so we can prepare for the visit.
Systematic Diagnosis
We inspect controls, electrical components, circulation, sensors and system performance to identify the cause.
Clear Repair Options
You receive a plain-English explanation before additional repair work proceeds.
Repair & Performance Test
Approved repairs are completed and the system is tested for reliable heating and hot water.
Prevention Advice
We explain any servicing or settings changes that can reduce the chance of the fault returning.
MCS heat pump repairs
A heat pump that will not heat, shows an error code or ices up outside a normal defrost needs someone who understands the system. APS MCS technicians diagnose faults across Berkshire, restore heating and hot water, and tell you honestly whether a repair or a replacement is the better call.
- 25+ Years Trading
- 750+ Reviews
- 12,000+ Customers
- Gas Safe & OFTEC Registered
- £5 Million Public Liability
- Independent Local Business
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Heat Pump Repairs in Newbury & Berkshire — FAQs
Why is my heat pump not heating properly?
Common causes include low refrigerant, dirty filters, incorrect flow temperatures, undersized radiators, defrost faults or control errors. Our engineers diagnose the specific cause on site.
What are common air source heat pump faults?
Low pressure refrigerant leaks, sensor failures, defrost cycle issues and circulation pump faults are common. Our MCS engineers diagnose and repair Vaillant, Worcester Bosch and other brands.
Is it worth repairing an old heat pump?
It depends on the fault, age and efficiency of the unit. We provide honest advice — sometimes a repair is appropriate; sometimes upgrading to a modern high-SCOP unit makes more sense.
Do you offer emergency heat pump repairs?
Yes. Loss of heating in winter is treated urgently. Call 01635 269888 and we confirm engineer availability for your postcode.