Boiler Service London

Annual boiler service in London

A yearly boiler service is the simplest way to keep your heating safe, efficient and reliable through a London winter. Our Gas Safe registered engineers carry out boiler service London appointments in every borough, 7 days a week, for combi, system and conventional gas boilers from all the major manufacturers. You get a fixed price before we attend, a thorough service on the day and a written record for your Benchmark logbook.

Servicing isn't a box-ticking exercise. A boiler that hasn't been looked at for a few years can burn gas less cleanly, waste fuel and wear out parts early — and most manufacturers will refuse a warranty claim if the annual service has been missed.

What's included in our boiler service

• Visual inspection of the boiler, controls, pipework and flue route for damage, corrosion or leaks.
• Removal of the casing to inspect and clean internal components, including the burner, heat exchanger and fan where accessible.
• Flue gas analysis with a calibrated analyser to confirm the boiler is burning safely and efficiently.
• Gas pressure and gas rate checks against the manufacturer's data.
• Checks on the flame supervision device, seals, ignition and safety shut-off operation.
• Condensate trap and pipe inspection and clean — a common cause of winter breakdowns.
• System pressure and expansion vessel check, with advice on bleeding radiators or adding a magnetic filter if sludge is present.
• Benchmark logbook updated and a written service report emailed to you.

Boiler service price in London

A standard gas boiler service in London starts from £95 + VAT. The price is confirmed before your appointment and there's no call-out fee. If we spot a worn part during the service, we show you, explain what it does and give you a fixed price to replace it — nothing is fitted without your agreement.

Why servicing matters

Carbon monoxide has no smell or colour, and a poorly burning boiler is one of the main ways it gets into a home. An annual service checks combustion properly, so you know your appliance is safe. It also keeps efficiency up: a clean burner and heat exchanger mean less gas for the same heat, which matters with London energy bills.

Most importantly for many households, servicing prevents the breakdown that leaves you without heating in January. Worn electrodes, blocked condensate traps and failing seals are usually picked up during a service long before they stop the boiler working.

If your boiler has already stopped working, book our boiler repair London service instead. For make-specific advice, see our domestic boiler brand service pages or our Gas Safe boiler engineer page.