What's Included in a Heat Pump Service?

What's Included in a Heat Pump Service? A Complete UK Checklist

If you've never had a heat pump serviced before, it's a fair question: what actually happens during the visit, and is it even necessary? Unlike a boiler service, which most UK homeowners have some familiarity with, heat pump servicing is newer territory for a lot of people, and it's easy to end up paying for a visit without knowing whether it covered what it should have.

Here's a straightforward, independent breakdown of what a proper heat pump service should include, and how often you actually need one.

What Should Be Checked During a Heat Pump Service

A thorough service isn't just a quick look at the outdoor unit. It should cover the whole system, not just the parts that are easiest to see.

System pressure and flow temperatures. The engineer should check that your system is running at the flow temperature it was designed for, not just whatever it happens to be set to. A flow temperature that's crept up over time is one of the most common causes of high running costs, and most one-off "quick" services never catch it.

Controls and settings. Heating curves, weather compensation settings, and hot water schedules should all be reviewed, not just left as they were on installation day. Systems that were commissioned correctly a year ago can drift out of an efficient setup without anyone changing anything deliberately.

Refrigerant circuit and outdoor unit. A visual and functional check of the outdoor unit, including airflow around it, condensate drainage, and any signs of wear.

Filters and strainers. Blocked filters restrict flow and force the system to work harder than it needs to, which shows up on your electricity bill before it shows up as an obvious fault.

Electrical connections and safety checks. Standard checks to confirm nothing has loosened or degraded since installation or the last service.

A written summary of findings. This is the part that gets skipped most often. A proper service should leave you with clear, plain-English recommendations, not just a tick-box form, so you know exactly what's fine, what's worth watching, and what needs attention.

How Often Should a Heat Pump Be Serviced?

Most manufacturers recommend an annual service, similar to a boiler, and this is usually also a condition of keeping your warranty valid. That said, annual is a minimum, not necessarily optimal.

A few situations where it's worth checking your system more than once a year:

• The first year after a new installation, when settings are most likely to need fine-tuning as you learn how the system behaves through a full heating season

• If you've noticed running costs creeping up without an obvious cause

• If your home hasn't been reaching temperature reliably, even intermittently

• After any change to the property, like an extension, new windows, or added insulation, that changes the heat loss the system was originally sized for

If nothing's changed and the system has been running well, once a year is genuinely enough. The value isn't in the frequency, it's in whether the service actually checks the things that matter.

What's the Difference Between a Basic Service and a Full Optimisation?

This is worth knowing before you book anything. A basic annual service confirms the system is safe and running, it's a maintenance check, not a performance review. It won't necessarily catch a system that's technically working but running less efficiently than it should be, which is a genuinely common issue with heat pumps that were commissioned quickly or left on default settings.

If you want more than a pass/fail check, our Heat Pump Service Plus goes further than a standard service. We check flow temperatures, controls, system pressure and overall performance, and give you clear, independent recommendations for anything that could be improved, not just confirmation that nothing's actively broken.

For homeowners in Essex and nearby areas who'd rather have someone at the property in person, our on-site heat pump service covers the same thorough check carried out face to face, along with servicing, optimisation and powerflushing if needed.

If something turns up during a service that needs a proper fix rather than just monitoring, our Fix My Heat Pump service can help you understand exactly what's wrong and what it'll take to put right.

Frequently Asked Questions

Can any heating engineer service a heat pump, or do they need specific training? Heat pumps work differently to boilers, so ideally the person servicing yours should have specific heat pump experience, not just general heating or refrigeration qualifications. It's worth asking directly before booking.

Does servicing affect my warranty? Most manufacturer warranties require proof of annual servicing to stay valid, so keep your service records even if nothing gets flagged.

Is a heat pump service the same as a heat loss survey? No. A service checks how your existing system is performing. A heat loss survey calculates how much heat your property loses room by room, which is used for sizing a new system correctly, not maintaining one you already have.

How much does a heat pump service cost? This varies depending on what's included. We've broken down typical UK pricing in detail in our heat pump servicing cost guide.