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.
Repairs in County Durham that need a part ordered are explained and priced before the engineer leaves. Across County Durham and County Durham, refrigerant repairs on split systems are carried out by an F-gas certified engineer. For repeated faults in County Durham, the engineer looks at the system design as well as the failed part.
Who it suits
- Rooms or hot water not getting warm enough
- Heat pumps showing an error code or fault light
- Systems losing pressure or needing frequent topping up
- 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 County Durham
These are guide prices including VAT. The rate for your visit in County Durham 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–£170 |
| Sensor or thermistor replacement | £120–£270 |
| Expansion vessel or pressure relief valve | £150–£340 |
| Circulating pump replacement | £240–£470 |
| Fan motor replacement | £290–£630 |
| Refrigerant leak repair and re-gas (split systems) | £340–£920 |
| Main control board (PCB) replacement | £440–£1,050 |
Inc VAT. The fault-finding rate is agreed before we attend; repairs are priced in writing before parts are ordered.
Towns we cover in County Durham
We cover 14 towns in County Durham for heat pump repairs. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Darlington | DL1 | Newton Aycliffe | 7 h 16 min |
| Hartlepool | TS26 | Peterlee | 7 h 14 min |
| Stockton-on-Tees | TS18 | Billingham | 7 h 15 min |
| Durham | DH1 | Chester-le-Street | 7 h 13 min |
| Chester-le-Street | DH2 | Stanley | 7 h 12 min |
| Billingham | TS23 | Stockton-on-Tees | 7 h 15 min |
| Stanley | DH9 | Chester-le-Street | 7 h 12 min |
| Consett | DH8 | Stanley | 7 h 12 min |
| Newton Aycliffe | DL5 | Bishop Auckland | 7 h 15 min |
| Bishop Auckland | DL14 | Newton Aycliffe | 7 h 14 min |
| Seaham | SR7 | Peterlee | 7 h 12 min |
| Peterlee | SR8 | Seaham | 7 h 13 min |
| Barnard Castle | DL12 | Bishop Auckland | 7 h 16 min |
| Sedgefield | TS21 | Newton Aycliffe | 7 h 14 min |
Heat pump repairs questions
Can you repair a heat pump installed by another company?
Yes. We carry out fault-finding and repairs on heat pumps installed by other companies, including monobloc and split systems. Tell us the make, model and approximate age when you get in touch, plus any error code shown. If the system is still under the manufacturer's warranty, it may be quicker to contact the original installer or manufacturer first.
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.
Is ice on my heat pump a fault?
Some frost on the outdoor unit in cold, damp weather is normal, and the unit clears it with regular defrost cycles, often releasing a little vapour. It becomes a fault when thick ice builds up and does not clear, or when ice blocks the fan. That can point to poor airflow, a failed sensor, drainage problems or low refrigerant, and needs checking.
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.