Heat pump servicing costs in the UK typically run between £100 and £200 per year for a standard air source heat pump. That figure surprises some owners who are used to paying £60–£80 for a boiler service — but a heat pump has more components to check, and skipping annual maintenance can quietly erode efficiency, void your warranty, and in some cases breach the conditions of your Boiler Upgrade Scheme grant. This guide breaks down what a service covers, what it costs, how often you need one, and what you can safely do yourself between visits.
Most manufacturers and the MCS (Microgeneration Certification Scheme) recommend an annual service for air source and ground source heat pumps. Some manufacturers specify every two years for systems under low demand, but annual is the safe default — especially during the first few years when teething issues are most likely to emerge.
If your heat pump is covered by the Boiler Upgrade Scheme (BUS), check your installer’s terms carefully. Many MCS-certified installers include one or two years of servicing as part of their installation package; after that, you’re paying independently. Missing a service won’t automatically invalidate your BUS grant, but it can void manufacturer warranties, which typically run for 5–10 years.
A professional heat pump service is more thorough than a boiler check. Here’s what a competent engineer should inspect:
A good engineer will also review your system’s performance data if your heat pump has smart monitoring — many modern units log COP (coefficient of performance) data, and a sudden dip can indicate a problem before it becomes serious. See our guide to heat pump efficiency for more on what healthy performance looks like.
Costs vary by region, system type, and installer. Here’s a realistic breakdown:
| Service type | Typical cost | Notes |
|---|---|---|
| Air source heat pump (basic) | £100–£130 | Visual checks, filter clean, controls test |
| Air source heat pump (full) | £130–£200 | Includes refrigerant check, F-Gas cert required |
| Ground source heat pump | £150–£250 | Additional loop and pump inspection |
| Service contract (annual) | £120–£180/yr | Often cheaper than ad-hoc; covers callouts |
| Combined boiler + heat pump (hybrid) | £180–£280 | Two appliances, usually one visit |
London and the South East tend to sit at the top of these ranges. Scotland and parts of Northern England are often 10–15% cheaper. If your installer quotes significantly under £100 for a full service including refrigerant checks, ask questions — cutting corners on an F-Gas inspection is both a legal issue and an efficiency risk.
Some manufacturers (notably Daikin and Mitsubishi Electric) offer their own service plans through approved engineers. Third-party service contracts are also available through companies like Hometree, Boiler Plan, and local heating specialists.
A service contract typically costs £120–£180 per year and often includes priority callout if something goes wrong, plus parts cover up to a certain value. If you have an older unit or one outside its manufacturer warranty, a contract with parts cover can be genuinely worth the premium. For a newer system still under warranty, a straightforward annual service visit is usually sufficient.
The Energy Saving Trust recommends comparing at least two service quotes before committing to a contract — renewal rates can creep up significantly after year one.
MCS certification governs installations, not ongoing servicing — but there’s an important indirect link. Most manufacturers require annual servicing by a qualified heating engineer (F-Gas registered for refrigerant work) to maintain the warranty. If something fails and you haven’t kept service records, the manufacturer can — and often will — decline a warranty claim.
You don’t need to use the original MCS-certified installer for servicing. Any qualified engineer can carry out the work, as long as they hold the relevant F-Gas certification. You can check installer credentials on the MCS Installer database. Always keep a copy of the service report — this is your paper trail for warranty claims.
For Boiler Upgrade Scheme recipients, Ofgem doesn’t require annual servicing as a condition of the grant, but your installer’s own warranty terms may do so. Check the small print you signed at installation. More on grants at our heat pump grants guide.
You shouldn’t attempt refrigerant work, electrical checks, or anything inside the sealed refrigerant circuit — these require professional qualifications. But there’s a useful checklist of owner maintenance tasks that take 10 minutes and can meaningfully protect your system:
Keeping a simple maintenance log — even a note on your phone with dates and any observations — is useful context for your engineer at the annual service and invaluable if a warranty claim ever arises.
There’s a lot of advice online about cleaning heat pump coils yourself with a garden hose. This isn’t necessarily wrong, but it carries risk: pressurised water can bend the delicate aluminium fins on the evaporator coil, reducing airflow and efficiency. If you’re confident and gentle, a low-pressure rinse with clean water is fine. If in doubt, leave it to the engineer.
Never attempt to top up refrigerant yourself. Beyond the legal issue (only F-Gas registered engineers can legally purchase and handle refrigerants in the UK), adding refrigerant to a system with a leak only masks the problem and can cause compressor damage. The UK F-Gas regulations are strict — fines for non-compliance can be substantial.
Yes — with caveats. A well-maintained heat pump runs at its rated efficiency; a poorly maintained one doesn’t. A blocked evaporator coil or low refrigerant charge can reduce COP by 15–20%, meaning you’re paying more to heat your home without realising why. On a typical system with annual running costs of £900–£1,400, a 15% efficiency loss costs £135–£210 extra per year — more than the service itself.
Catching a minor refrigerant leak early (£80–£150 to fix) is far cheaper than dealing with compressor failure caused by running with insufficient charge (compressor replacements can run to £1,500–£3,000). Annual servicing isn’t a guarantee, but it’s good insurance.
For more on total ownership costs, see our guide to heat pump costs in the UK.
For most UK heat pump owners, annual servicing at £100–£200 is money well spent. It protects your warranty, maintains efficiency, and catches problems before they become expensive. The only scenario where you might reasonably stretch to every two years is a very new system with a comprehensive manufacturer warranty and no signs of any issues — and even then, the peace of mind rarely costs more than a tank of petrol.
Use an F-Gas certified engineer, keep your service records, and do the simple owner checks in between. That’s the full picture.
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