01 / Residential · Boiler service & annual maintenance
Boiler Service in London
A full annual service keeps your boiler safe, efficient and inside its warranty. Gas Safe registered engineers, a fixed price agreed before we start, and a written report on every visit in London.
Gas Safe registered · No. 660014 · ★ 5.0 on Google
We call back within 30 minutes(working hours)
Gas SafeRegistered
Residential
Certified
Emergency
Response
Insured
30 minWorking hours
“Thank you to Des, he has been my gas engineer since I started my business in 2022. He managed to safely inspect all my gas appliances and safety check everything, always a quality service.”OnFries, Google review
/ Call or email
Get a fixed-price quote
Two ways to reach us in London: call the 24/7 line, or send the form and we'll reply the same working day.
We call back within 30 minutes(working hours)
Smell gas? Turn it off at the meter, open windows and call the National Gas Emergency line on 0800 111 999 first — then call us.
/ What's included in a service
A boiler service is an annual safety and efficiency check carried out by a Gas Safe registered engineer. It isn't a quick look — we strip and inspect the key components, measure what the boiler is actually doing with a flue gas analyser, and put right anything that's drifting before it turns into a breakdown.
Most manufacturers require an annual service to keep the warranty valid, and landlords need the boiler checked as part of the gas safety certificate. For everyone else it's simply the cheapest year you'll spend on your heating: a boiler that's clean, correctly set and running at the right pressure uses less gas and lasts longer.
We service combi, system and regular (heat-only) boilers from all the major manufacturers. If we find a fault during the service we'll tell you straight, price the repair in writing and only go ahead once you've said yes.
- Combi, system & regular boilers
- All major brands
- Warranty-compliant
- Written service report
Lost heating or hot water in London? Call 07515 123196 — 24/7 emergency line.
- Flue gas analysis and combustion check
- Gas rate and burner pressure checked against the data plate
- Heat exchanger, burner and ignition inspected and cleaned
- Seals, fans, pumps and safety devices tested
- System pressure, expansion vessel and pressure relief checked
- Controls, thermostat and timer tested
- Visual check of pipework, ventilation and flue terminal
- Written service report with any advisories
/ How it works
- 01BookPick a slot — mornings, afternoons or Saturdays. We confirm by text.
- 02Service45–60 minutes on site: strip, inspect, test with a flue gas analyser, adjust.
- 03ReportWritten service report, warranty record completed, any advisories priced.
/ Boiler service cost in London
A boiler service is a fixed price, agreed when you book — it doesn't change on the day. The price depends on the boiler type (a combi is quicker than a system boiler with a cylinder) and whether you combine it with a landlord gas safety certificate, which is cheaper on the same visit than booked separately. Any repair we find is quoted separately in writing, and only done if you say yes.
/ Covering all London postcodes — the City, Canary Wharf and the outer boroughs
London is our busiest area. Inner-London terraces and conversions often have boilers in tight kitchen cupboards or loft spaces with long flue runs, and many older flats still run on open-vented systems with tanks in the roof. We work inside and outside the North and South Circular and plan around parking, permits and the Congestion Charge so the job isn't held up by logistics.
We cover the whole of London (all London postcodes) — from the City, Canary Wharf and the outer boroughs — and the surrounding areas including Croydon, Ealing, Bromley, Wandsworth, Richmond, Kingston, Sutton and Barnet. Typical housing here is Victorian and Edwardian terraces, 1930s semis, purpose-built flats and new-build apartments, and our engineers know the boiler types, flue positions and system layouts that go with it.
We're based in Woking, Surrey, roughly 50 minutes from London in typical traffic — a normal working day for us, not a special trip.
Same-day appointments are available for most of London, and every job — a service, a repair or a full installation — comes with a fixed price agreed before we start and a written record when we're done.
/ Other services in London
Boiler Service in nearby areas
/ Find us
DMD Gas is based in Woking, Surrey — here's exactly where, and the fastest route from London.
/ Questions we get asked
Straight answers. If yours isn't here, call — it's quicker than a form.
How often should a boiler be serviced?
Once a year. Annual servicing is a condition of most manufacturer warranties and is the interval the Gas Safe Register recommends. Summer or early autumn is the ideal time — before the heating season, when appointments are easier to get.
How long does a boiler service take?
Usually 45 minutes to an hour for a combi, a little longer for a system or regular boiler with a cylinder. We'll tell you if anything we find needs more time.
What's the difference between a service and a gas safety check?
A gas safety check (CP12) confirms appliances are safe to use; a service also cleans, adjusts and tests the boiler's components for efficiency and reliability. Landlords usually book both on the same visit.
Will a service fix a fault?
Minor adjustments are included. Anything that needs a part or extra labour is quoted in writing on the day and only done with your go-ahead.
Do you service boilers under warranty?
Yes. We're Gas Safe registered and complete the manufacturer's service record, which is what most warranties require.
Ready when you are.