How much does a boiler service cost in Croydon in 2026?

The short version is above. Here is what sits behind that number, and why two quotes for "a boiler service" can mean completely different pieces of work.

Boiler service prices at Morheat

Fixed prices, no call-out charge on a booked service, no upselling on the day.

What a proper boiler service includes

A full service is a set of checks and measurements, not a look and a sticker. On a standard combi it should cover:

• A combustion analysis. The engineer puts a flue gas analyser probe into the flue and reads how cleanly the boiler is burning. This is the most important test of the visit. If nobody put a probe in your flue, you did not have a service.
• Operating pressure and gas rate. Checked against the manufacturer's figures for your specific model, not a general rule of thumb.
• Burner, heat exchanger and condensate trap. Inspected and cleaned. A blocked condensate trap is a common reason a boiler locks out in the first cold week of the year.
• Seals, casing and ventilation. A failed case seal on a room-sealed appliance is a genuine safety issue, not a cosmetic one.
• Flue integrity across the accessible parts of the run.
• Controls and safety devices tested, not assumed.

You should get a written service record at the end of it.

The three things a cheap service usually skips

When a service is priced well below the going rate, something has come out of it. Almost always one of these three:

1. The combustion test. It takes time and needs a calibrated analyser, which is an expensive tool that has to be serviced itself every year. Skip it and a service becomes a visual inspection.
2. Taking the case off. You cannot inspect or clean a burner through the front panel.
3. The written record. No paperwork means no evidence for a warranty claim later, which is often the whole reason people book.

Why the warranty point matters more than the price

Most manufacturer warranties on a new boiler require an annual service by a Gas Safe registered engineer, recorded and dated. Miss one and you can find the warranty is not honoured at exactly the moment you need it. On a boiler still inside a long warranty, the annual service is cheap insurance against a heat exchanger bill.

Check the terms of your own warranty. They vary by manufacturer, and some require the service to fall within a set window each year rather than simply once every twelve months.

A service and a CP12 are not the same thing

This trips people up constantly.

• A boiler service is maintenance. It keeps the appliance running properly and protects the warranty. It is optional and it is for your benefit.
• A CP12, or Landlord Gas Safety Record, is a safety inspection of every gas appliance in a rented property. It is a legal requirement for landlords, renewed annually (see HSE guidance for landlords).

A CP12 does not include a service, and a service does not produce a CP12. Landlords often want both, which is why they are usually quoted together. See CP12 certificates for how that works.

When a service will not fix the problem

Worth saying plainly, because it saves people money. If your boiler is already faulty, a service is the wrong booking. A service is scheduled maintenance on a working appliance. If it is locking out, losing pressure or throwing a fault code, book a repair instead. The diagnostic work is different and so is the visit.

Common questions

How long does a boiler service take?

Around 45 minutes to an hour for a standard combi boiler in good condition. It takes longer if the boiler has not been serviced for several years, if the condensate trap needs clearing, or if the combustion readings come back outside the manufacturer's range and need investigating.

How often should a boiler be serviced?

Once a year. Most manufacturer warranties require an annual service by a Gas Safe registered engineer and will ask for dated records if you make a claim. Annually is also how you catch a failing component while it is still a small repair.

Written and checked by Daniel Morgan, Gas Safe #585424. Prices correct as of September 2026.