Heat pump replacement means removing an existing outdoor unit, and sometimes the cylinder and controls, and fitting a new heat pump sized and set up for the home as it is now. Air source heat pumps typically last 15–20 years, so systems fitted when the technology was newer to UK homes are reaching the point where repairs become harder to justify.
Across West Glamorgan and West Glamorgan, old units are removed with their refrigerant recovered by an F-gas certified engineer. Homes in West Glamorgan with a heat pump that never kept them warm can have the whole design checked before a new unit is chosen. We replace heat pumps in West Glamorgan whoever fitted the original system, including monobloc and split units.
Who it suits
- Units that have failed with a major fault, such as a compressor failure
- Oversized systems that short cycle and cost more to run than expected
- Older units where parts are becoming hard to source
- Heat pumps nearing the end of their typical life with rising repair costs
Grants and rules for heat pumps in Wales
Homes in West Glamorgan can use the Boiler Upgrade Scheme, which applies in Wales as well as England: £7,500 towards an air source heat pump, or £9,000 when it replaces oil or LPG heating for installations from 21 July 2026 to 31 March 2027. The MCS-certified installer named in your quote applies and deducts the grant.
Heat pump replacement prices in West Glamorgan
These are guide prices including VAT. The rate for your visit in West Glamorgan is confirmed before we book it, and any repair is priced in writing before parts are ordered.
| Work | Installed guide price |
|---|---|
| Replacing an old outdoor unit like-for-like | £6,000–£9,500 |
| Full system replacement, 2–3 bedroom terrace or semi | £10,500–£13,500 |
| Full system replacement, 3 bedroom semi or small detached | £12,000–£15,500 |
| Full system replacement, 4 bedroom detached | £14,000–£18,000 |
Installed, inc VAT. Grant funding rarely applies to replacing a heat pump, so these prices are shown without any deduction; we check eligibility at survey.
Towns we cover in West Glamorgan
We cover 8 towns in West Glamorgan for heat pump replacement. Each links to local guide prices and the grant position for Wales.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Swansea | SA1 | Mumbles | 7 h 48 min |
| Neath | SA10 | Briton Ferry | 7 h 48 min |
| Briton Ferry | SA12 | Neath | 7 h 48 min |
| Gorseinon | SA4 | Swansea | 7 h 48 min |
| Clydach | SA6 | Pontardawe | 7 h 48 min |
| Mumbles | SA3 | Swansea | 7 h 49 min |
| Pontardawe | SA8 | Clydach | 7 h 47 min |
| Port Talbot | SA12 | Briton Ferry | 7 h 49 min |
Heat pump replacement questions
Can I get a grant to replace my heat pump?
Usually not. In England and Wales, the Boiler Upgrade Scheme cannot normally fund a home that has already been funded for a heat pump, and it is aimed at replacing fossil-fuel or electric heating. Your circumstances may differ, so we check eligibility before quoting. In Scotland, check Home Energy Scotland's criteria. Northern Ireland has no dedicated grant at present.
Can I replace just the outdoor unit?
Often, yes, if the rest of the system is sound and correctly designed. The cylinder, controls and radiators can stay where they are compatible with the new unit. Some older cylinders and controllers do not work with a new heat pump, and the survey checks this. If the original design was the problem, replacing only the unit will not fix it.
How much does it cost to replace a heat pump?
Replacing an old outdoor unit like-for-like has a guide price of £6,000–£9,500, installed and including VAT. Re-sizing, a new cylinder, radiator upgrades or new controls add to that, and each is itemised in your written quote. The final price is fixed after a survey, once we know what the existing system needs.
How long does an air source heat pump last?
Air source heat pumps typically last 15–20 years, depending on the quality of the original design, how hard the unit has worked, where it is sited and how well it has been serviced. Units that short cycle or run at high flow temperatures for years may wear sooner. Annual servicing helps components last and spots problems early.