Line open 24/7 Gas Safe registered · No. 932798 9.86/10 Checkatrade · 147 reviews 4.9/5 Google · 94 reviews Company No. 12326959 24/7 · including bank holidays
020 3674 8514Answered by a person, 24/7 Call WhatsApp

Emergency Boiler Repair in London

A dead boiler in January doesn't wait for a convenient appointment.

Call 020 3674 8514 WhatsApp 07865 292684
House cutaway Bathroom Kitchen Boiler cupboard GAS Check the pressure: 1–1.5 bar
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

Our Gas Safe engineers carry the common failure parts for the major brands, and we tell you repair-versus-replace with real numbers, not fear.

Boiler breakdown in London: do this now, while you wait

  1. Note the fault code and the makeIt's the difference between an engineer arriving with the right part and arriving with a van full of guesses.
  2. Try one reset, onceA single reset after a pressure top-up is fine. Repeated resetting of a boiler that keeps locking out can mask a real fault; twice is enough.
  3. Check the simple thingsCredit on a prepay meter, the timer after a power cut, the thermostat batteries. No shame in it, it's a meaningful share of winter callouts.
  4. Soot, smells or a CO alarm, stop everythingTurn the boiler off, open windows, call 0800 111 999. Carbon monoxide outranks heating.

What causes a boiler breakdown in London

  • 01
    Low system pressure

    The most common lockout, and if it recurs, the pressure is going somewhere: a weep, a radiator valve, an expansion vessel.

  • 02
    Frozen condensate

    The signature cold-snap failure; five minutes with warm water fixes it, lagging prevents it.

  • 03
    Component wear

    Pumps, diverter valves, fans and PCBs fail with age, mostly repairable same-day on mainstream brands.

  • 04
    Scale and sludge

    Hard water scales the heat exchanger; dirty systems sludge it. Both starve the boiler slowly and kill it young.

  • 05
    Ignition and flame faults

    The boiler tries to light, fails and locks out, often with a clicking sound. A worn ignition lead, a dirty flame sensor or a gas valve fault is usually to blame. It is a Gas Safe repair, and most of those parts are on the van.

  • 06
    No gas getting to the boiler

    If the hob will not light either, the problem is the gas supply, not the boiler. A prepay meter out of credit or work in the street are the usual reasons. Check before you pay anyone to come out.

Local conditions we work around

A London boiler lives a harder life than the same unit anywhere soft. Scale on the heat exchanger costs efficiency every year and eventually causes the overheat lockouts and kettling that bring us out, so the failure pattern here is genuinely predictable from the water. Flats add a second issue: flues that terminate into a shared lightwell, and combis fed from a communal cold main whose pressure drops when the whole block showers. Both get checked before anyone condemns the appliance.

Where we work in London

No postcode costs more than another. Pick your area for local streets, common problems and nearby reviews.

Notting HillPutneyHackneyBatterseaBalhamRichmondTwickenhamWimbledonGreenwichLewishamCroydonBromley All London areas →

Boiler breakdown in London, your questions

How fast can I get an emergency boiler repair in London?
Ring us and we give you a real arrival time for your postcode before anyone sets off. We usually arrive within 60 minutes across London. If the boiler has stopped and you have young children, someone elderly or someone unwell at home, tell us when you ring so we can take that into account.
What does an emergency boiler repair cost?
Most boiler faults are diagnosed and repaired for £130 to £420, including the part. You get that fixed price in writing before any work starts. Our time is £110 for the first hour and £45 for each extra half hour, with no call-out fee and no night or weekend surcharge.
Will my boiler be fixed on the first visit?
Usually, yes, because our vans carry the parts that fail most often on the main boiler brands. If a part has to be ordered, we tell you on the visit, give you a date, and make the boiler safe in the meantime.
What counts as a boiler emergency?
No heating or hot water in cold weather, a boiler leaking water, or a boiler that keeps locking out are all worth a call now. A smell of gas, soot around the boiler or a carbon monoxide alarm is different: turn the boiler off, get fresh air and ring 0800 111 999 first.
Are your engineers Gas Safe registered for boiler work?
Yes, every engineer who touches gas carries their Gas Safe ID, and you can verify the registration number on the official register in thirty seconds. Ask to see the card; we'd rather you did.
My boiler is old, will you push me to replace it?
No. We quote the repair, and if the unit's age makes replacement worth considering we give you both numbers and the reasoning. Plenty of fifteen-year-old boilers earn another winter.
Do you charge more at night or weekends?
No. £110 first hour, £45 per additional half hour, whatever the clock says. No call-out fee either.
Can you service it while you're here?
If the repair leaves time in the hour, yes, and a serviced boiler is the cheapest insurance against the next breakdown.

Emergency Boiler Repair? Call.

Tell us what is happening and where. You get a time and a price before anyone sets off.

020 3674 8514

Or WhatsApp 07865 292684