Typical repairs fall within a guide range of £90–£1,100, including VAT, depending on the part and the time involved. Refrigerant repairs must be done by an F-gas certified engineer. Regular heat pump servicing catches many of these faults before they stop the system working.
We repair heat pumps in Cornwall whoever installed them, including older monobloc and split systems. For repeated faults in Cornwall, the engineer looks at the system design as well as the failed part. Outdoor units in exposed spots around Cornwall can ice more heavily, so siting is checked as part of any icing fault.
Who it suits
- Systems losing pressure or needing frequent topping up
- Outdoor units that have become noisy, iced up or keep switching on and off
- Rooms or hot water not getting warm enough
- Heat pumps installed by another company that need a second opinion
Grants and rules for heat pumps in England
In England the Boiler Upgrade Scheme gives £7,500 towards an air source heat pump (£9,000 if it replaces oil or LPG, from 21 July 2026 to 31 March 2027), and since 28 April 2026 a valid EPC is no longer needed. The grant is applied for by the MCS-certified installer and shown as a deduction on your quote.
Heat pump repairs prices in Cornwall
These are guide prices including VAT. The rate for your visit in Cornwall is confirmed before we book it, and any repair is priced in writing before parts are ordered.
| Repair | Guide price |
|---|---|
| Fault-finding visit and diagnosis | £90–£190 |
| Sensor or thermistor replacement | £120–£290 |
| Expansion vessel or pressure relief valve | £150–£360 |
| Circulating pump replacement | £260–£490 |
| Fan motor replacement | £310–£670 |
| Refrigerant leak repair and re-gas (split systems) | £360–£980 |
| Main control board (PCB) replacement | £460–£1,150 |
Inc VAT. The fault-finding rate is agreed before we attend; repairs are priced in writing before parts are ordered.
Towns we cover in Cornwall
We cover 15 towns in Cornwall for heat pump repairs. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Redruth | TR16 | Camborne | 8 h 02 min |
| Falmouth | TR11 | Truro | 8 h 03 min |
| St Austell | PL25 | Bodmin | 8 h 01 min |
| Truro | TR1 | Falmouth | 8 h 02 min |
| Camborne | TR14 | Redruth | 8 h 02 min |
| Newquay | TR7 | Truro | 8 h 00 min |
| Penzance | TR18 | Hayle | 8 h 03 min |
| Bodmin | PL31 | Wadebridge | 8 h 00 min |
| Saltash | PL12 | Plymouth | 8 h 00 min |
| Bude | EX23 | Launceston | 7 h 56 min |
| Hayle | TR27 | Camborne | 8 h 02 min |
| Helston | TR13 | Camborne | 8 h 03 min |
| Launceston | PL15 | Liskeard | 7 h 58 min |
| Liskeard | PL14 | Saltash | 8 h 00 min |
| Wadebridge | PL27 | Bodmin | 7 h 59 min |
Heat pump repairs questions
Do refrigerant repairs need a specialist?
Yes. Any work on a heat pump's refrigerant circuit, such as tracing a leak, replacing a component or re-gassing, must by law be done by an F-gas certified engineer where the refrigerant is fluorinated, such as R32; units using R290 (propane) need an engineer trained in flammable refrigerants. On split systems the refrigerant runs through pipes inside your home, so leaks there are more likely than on sealed monobloc units.
Why is my heat pump showing an error code?
An error code is the heat pump's way of reporting a problem it has detected, such as low water flow, a sensor reading out of range or a communication fault between units. Note the code and check the manual, as some codes clear after a simple reset or pressure top-up. If it returns, an engineer can trace the underlying cause.
How much does a heat pump repair cost?
Heat pump repairs have a typical range of £90–£1,100, including VAT, depending on the part and labour involved. Sensor replacements sit at the lower end, while control boards and refrigerant repairs on split systems sit higher. Every repair starts with a fault-finding visit, with a guide price of £90–£180 for the first hour, and the repair is priced before work goes ahead.
Why does my heat pump keep switching on and off?
Frequent starting and stopping, called short cycling, is usually caused by an oversized heat pump, low water flow, too many zones closing at once or controls set with too narrow a range. It reduces efficiency and wears components. An engineer can check the settings, flow rates and design, and can often improve it with control changes before any parts are needed.