Not every replacement is about age. Some heat pumps were sized by rule of thumb, paired with radiators that are too small or set up without weather compensation, leaving homes cold or bills high. Replacing the unit alone will not fix those problems, so we start with a fresh heat loss survey and check the radiators, pipework, cylinder and controls.
Across Lanarkshire and Lanarkshire, old units are removed with their refrigerant recovered by an F-gas certified engineer. Homes in Lanarkshire with a heat pump that never kept them warm can have the whole design checked before a new unit is chosen. Every replacement in Lanarkshire starts with a fresh heat loss survey, not just a copy of the old unit's size.
Who it suits
- Units that have failed with a major fault, such as a compressor failure
- Older units where parts are becoming hard to source
- Systems that were undersized and struggle in cold weather
- Heat pumps nearing the end of their typical life with rising repair costs
Grants and rules for heat pumps in Scotland
In Scotland, heat pump funding comes through Home Energy Scotland rather than the Boiler Upgrade Scheme: a grant of up to £7,500 (up to £1,500 extra for eligible rural and island homes) and an optional interest-free loan of up to £7,500. For a home in Lanarkshire, apply and receive the written offer before the installation date is fixed.
Heat pump replacement prices in Lanarkshire
Guide prices for Lanarkshire, including VAT. We agree the visit rate before anyone attends, so there are no surprises on the day.
| 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 Lanarkshire
We cover 13 towns in Lanarkshire for heat pump replacement. Each links to local guide prices and the grant position for Scotland.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| East Kilbride | G74 | Cambuslang | 7 h 00 min |
| Hamilton | ML3 | Motherwell | 7 h 00 min |
| Cumbernauld | G67 | Airdrie | 6 h 57 min |
| Coatbridge | ML5 | Airdrie | 6 h 59 min |
| Airdrie | ML6 | Coatbridge | 6 h 59 min |
| Motherwell | ML1 | Bellshill | 7 h 00 min |
| Rutherglen | G73 | Cambuslang | 6 h 59 min |
| Cambuslang | G73 | Rutherglen | 6 h 59 min |
| Wishaw | ML2 | Motherwell | 7 h 00 min |
| Bellshill | ML4 | Motherwell | 6 h 59 min |
| Carluke | ML8 | Wishaw | 7 h 00 min |
| Lanark | ML11 | Carluke | 7 h 01 min |
| Strathaven | ML10 | Hamilton | 7 h 01 min |
Heat pump replacement questions
Will a new heat pump fit where the old one was?
Sometimes. A new unit may be a different size, weight or shape and may have different clearance requirements, so the existing base and position are checked at survey. The MCS noise assessment is carried out for the new unit, and a different position may be suggested if it improves performance or reduces sound at neighbouring windows.
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.
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.
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.