Every repair starts with a fault-finding visit, which is charged at a rate agreed before we attend. The guide price for a fault-finding visit is £90–£180 for the first hour, including VAT. The engineer reads the error history, tests the system and tells you what has failed, what the repair involves and what it will cost before any further work is done. If a part has to be ordered, you are told the likely wait and the price before you decide.
Outdoor units in exposed spots around Dyfed can ice more heavily, so siting is checked as part of any icing fault. For repeated faults in Dyfed, the engineer looks at the system design as well as the failed part. Heat pump owners in Dyfed can arrange a fault-finding visit at a rate agreed before an engineer attends.
Who it suits
- Systems losing pressure or needing frequent topping up
- Heat pumps showing an error code or fault light
- Outdoor units that have become noisy, iced up or keep switching on and off
- Rooms or hot water not getting warm enough
Grants and rules for heat pumps in Wales
In Wales 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; £2,500 for air-to-air). The MCS-certified installer named in your quote applies to Ofgem for you, and the grant comes off your quote.
Heat pump repairs prices in Dyfed
Guide prices for Dyfed, 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–£180 |
| Sensor or thermistor replacement | £120–£280 |
| Expansion vessel or pressure relief valve | £150–£350 |
| Circulating pump replacement | £250–£480 |
| Fan motor replacement | £300–£650 |
| Refrigerant leak repair and re-gas (split systems) | £350–£950 |
| Main control board (PCB) replacement | £450–£1,100 |
Inc VAT. The fault-finding rate is agreed before we attend; repairs are priced in writing before parts are ordered.
Towns we cover in Dyfed
We cover 11 towns in Dyfed for heat pump repairs. Each links to local guide prices and the grant position for Wales.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Llanelli | SA15 | Gorseinon | 7 h 48 min |
| Ammanford | SA18 | Pontardawe | 7 h 47 min |
| Aberystwyth | SY23 | Machynlleth | 7 h 40 min |
| Carmarthen | SA31 | Llanelli | 7 h 46 min |
| Cardigan | SA43 | Fishguard | 7 h 44 min |
| Fishguard | SA65 | Haverfordwest | 7 h 44 min |
| Haverfordwest | SA61 | Milford Haven | 7 h 46 min |
| Lampeter | SA48 | Carmarthen | 7 h 43 min |
| Milford Haven | SA73 | Pembroke Dock | 7 h 47 min |
| Pembroke Dock | SA72 | Milford Haven | 7 h 48 min |
| Tenby | SA70 | Pembroke Dock | 7 h 48 min |
Heat pump repairs questions
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.
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.
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.
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.