If you're searching for the cost of an air source heat pump service in the UK, you'll find quite a range of prices. But comparing heat pump servicing purely on price can be misleading one company may offer a straightforward annual appliance check, while another looks at the heat pump, heating system, controls, flow temperatures and overall property performance. Both get called a "heat pump service," but they're not the same thing. Before choosing on price alone, the better question is: what am I actually getting for my money?

How much does an air source heat pump service cost?

There isn't one standard UK price. Costs vary depending on your location, heat pump manufacturer, system type, what's included in the service, whether wider heating system checks are covered, whether optimisation is included, and whether ongoing technical support comes with it. Rather than chasing the cheapest number, it's worth looking at the scope of the service. A lower-priced check may suit you fine if all you want is a basic annual visit but if you're concerned about running costs, comfort, or how well your system was set up in the first place, you'll likely want something more comprehensive.

What should a basic heat pump service include?

Requirements vary by manufacturer, but a standard annual service typically covers general heat pump condition, the outdoor coil, condensate drainage, system pressure, filters and strainers, visible leaks, flow and return temperatures, electrical and control observations, fault history, and general system operation. All important but it raises a bigger question: what if the heat pump itself is completely fine?

A heat pump can work perfectly and still cost too much to run

Picture an engineer checking your heat pump and finding nothing wrong no faults, no leaks, no obvious problems. Service complete. But your flow temperature is unnecessarily high. Or your system isn't properly balanced. Or one undersized radiator is forcing the whole system to run hotter than it needs to. Technically the heat pump isn't broken but you could still be spending more on electricity than necessary. That's why a proper service should consider the system around the heat pump, not just the unit itself.

Should flow temperature be checked during a service?

We think it should. Heat pumps generally become more efficient as the required flow temperature drops as a rule of thumb, each 1°C reduction can improve efficiency by around 2–3%, though the real number depends on your heat pump, property, weather and heating system. That doesn't mean an engineer should just turn the temperature down; radiators or underfloor heating still need to keep the property comfortable. The goal is finding the lowest practical operating temperature for your home.

What does heat loss have to do with servicing?

Potentially a lot. A room-by-room heat loss calculation estimates how much heat each room needs in cold weather, then compares that against what your radiators can actually deliver. If 11 radiators can comfortably heat their rooms at a lower flow temperature but the living room radiator is undersized, you may end up running the entire system hotter just to keep that one room comfortable. Identifying and upgrading that radiator can let the whole system operate differently which is exactly why our Heat Loss Survey exists, and why a room-by-room assessment is built into Heat Pump Service Plus when you don't already have one.

What else should a comprehensive service look at?

Understanding whole-system performance means also checking expansion vessel condition, system pressure, zone valve operation, radiator and TRV operation, system balancing, heating controls, thermostat settings, weather compensation, flow temperature, hot water settings, and circulation. Sometimes we find nothing significant that's good news. Other times we find several small things that, together, are quietly affecting performance.

What if the engineer recommends additional work?

Worth asking any provider upfront: if they find something, are you obliged to pay them to fix it? With Heat Pump Service Plus, the answer is no. We'll explain what we found, why it matters, and what we'd recommend and where appropriate, provide a price for any physical work. But there's no obligation to use us; you're welcome to use your own plumber or electrician, and we'll brief them on the technical detail.

What happens after your annual service?

This is a real point of difference worth comparing. With many traditional services, once the engineer leaves, that's it until next year. We built Service Plus differently customers get access to a direct technical support line year-round. During working hours (Mon–Fri, 8am–6pm, excluding bank holidays), we aim to respond to urgent requests within one working hour. Where possible we help diagnose or resolve issues remotely; if a local engineer needs to attend, we help establish what's required.

What's included with Heat Pump Service Plus?

• Annual heat pump service

• Wider heating system assessment

• Room-by-room heat loss assessment where required

• Flow temperature optimisation

• Heating control and weather compensation review

• System balancing where required

• Expansion vessel, zone valve, radiator and TRV checks

• Pre-winter heating test

• Efficiency recommendations and simple operating guidance

• Direct technical support throughout the year

We normally carry out the annual service before the main winter heating season typically September or October so problems can be identified before you actually need the heat.

How much does it cost?

First year: £360 + VAT, paid upfront, covering your annual service, system assessment, and Service Plus support access. One month later, payments of £30 + VAT/month begin, funding your following year's membership so next year's service and ongoing support are already covered.

Is a cheaper heat pump service bad?

Not at all. If two services genuinely cover the same scope, taking the better-value option makes sense. The real question is whether you're comparing like with like: what's included, is the heating system checked (not just the unit), are controls and flow temperatures reviewed, is the system tested properly in heating mode, what happens if problems are found, and do you get support after the engineer leaves?

Don't just compare the price compare what you're getting

If all you want is an annual appliance check, a conventional service may be exactly right for you. But if you want someone to look at the whole heating system, find opportunities to improve performance, and stay available afterwards, that's why Service Plus exists: one annual service, whole-system optimisation, ongoing technical support, and clear, independent recommendations.

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