Heat pump repair is the diagnosis and fixing of faults in an air source heat pump, its water circuit, its controls or the hot water cylinder. Many faults have a simple cause, such as low system pressure, a blocked filter or a control setting, while others involve a failed sensor, pump, fan or circuit board.
Repairs in County Down that need a part ordered are explained and priced before the engineer leaves. For repeated faults in County Down, the engineer looks at the system design as well as the failed part. We repair heat pumps in County Down whoever installed them, including older monobloc and split systems.
Who it suits
- Rooms or hot water not getting warm enough
- Outdoor units that have become noisy, iced up or keep switching on and off
- 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 Northern Ireland
Northern Ireland does not have a dedicated heat pump grant for homeowners at present, and the Boiler Upgrade Scheme does not apply here. Heat pumps have sometimes been funded through the Northern Ireland Sustainable Energy Programme, so it is worth checking what is open when you enquire about a home in County Down.
Heat pump repairs prices in County Down
Guide prices for County Down, including VAT. We agree the visit rate before anyone attends, so there are no surprises on the day.
| 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 Down
We cover 13 towns in County Down for heat pump repairs. Each links to local guide prices and the grant position for Northern Ireland.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Bangor (County Down) | BT20 | Newtownards | 7 h 14 min |
| Newtownards | BT23 | Comber | 7 h 15 min |
| Newry | BT35 | Warrenpoint | 7 h 20 min |
| Banbridge | BT32 | Dromore | 7 h 18 min |
| Ballynahinch | BT24 | Downpatrick | 7 h 17 min |
| Comber | BT23 | Newtownards | 7 h 15 min |
| Donaghadee | BT21 | Bangor (County Down) | 7 h 14 min |
| Downpatrick | BT30 | Ballynahinch | 7 h 18 min |
| Dromore | BT25 | Banbridge | 7 h 17 min |
| Holywood | BT18 | Newtownabbey | 7 h 14 min |
| Kilkeel | BT34 | Warrenpoint | 7 h 21 min |
| Newcastle | BT33 | Downpatrick | 7 h 20 min |
| Warrenpoint | BT34 | Newry | 7 h 21 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.
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.
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.