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Emergency · London · 24/7

No Hot Water in London? Emergency Repairs, 24/7

No hot water in a cold snap is an emergency in any house with children or anyone elderly.

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No hot water in London
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

Most causes are fixable same-day, the skill is diagnosing which of the five usual suspects it is before parts get thrown at it.

No hot water in London: do this now, while you wait

  1. Check the boiler displayA fault code plus the make and model is the single most useful thing you can tell us on the phone.
  2. Check pressure and powerGauge below 1 bar? Repressurise via the filling loop to 1.2–1.5. Also check the timer, thermostat and the fused spur, power cuts scramble more schedules than boilers fail.
  3. In freezing weather, check the condensate pipeThe white plastic pipe outside freezes and locks the boiler out. Warm (not boiling) water along it, then reset.
  4. Smell gas at any point, stopCall the National Gas Emergency Service on 0800 111 999 before anyone else, including us.
Why it happens in London

What causes no hot water in London

  • 01
    Boiler lockout

    Low pressure, frozen condensate, failed ignition, the boiler protects itself by shutting down and shows a code.

  • 02
    Failed diverter valve

    Heating works but hot taps don't (or vice versa) on a combi, a classic diverter failure.

  • 03
    Cylinder faults

    On stored systems: a failed immersion, a thermostat set wrong, or a scaled coil in hard-water areas.

  • 04
    Airlock after work

    One spitting hot tap after recent plumbing is usually trapped air, not a fault.

What this means in London

Local conditions we work around

London runs on some of the hardest water in the country, roughly 280 to 320 ppm from the chalk that Thames Water draws on. Scale is the quiet cause behind a surprising share of the emergencies we attend: it narrows pipework, coats heat exchangers until a boiler overheats and locks out, and seizes the very stopcock you need at two in the morning. Add pipework that in much of the city dates to the Victorian or Edwardian build and was last touched in the 1960s, and the failures cluster in ways we can usually predict from the postcode before we arrive.

Where we do this in London

Covered across London

Same published rate card and the same twelve-month workmanship guarantee everywhere below, there is no postcode loading. Each area has its own page with an arrival time taken from our job records rather than chosen for a website.

ChelseaChiswickEalingHammersmithIslingtonCamdenClaphamWandsworthNotting HillPutneyHackneyBattersea All London areas →
Straight answers

No hot water in London, your questions

Is no hot water an emergency?
With vulnerable people in the house, yes, and landlords have legal obligations on hot water that make it urgent for tenants too. We treat winter no-hot-water calls at the same priority as leaks.
Can you fix it same-day?
Usually. Vans carry the common failure parts, diverter valves, immersion elements, thermostats, filling-loop parts. Obsolete boiler parts can add a day; we tell you before we leave, not after.
Repair or replace the boiler?
Our rule of thumb: if the repair costs more than a third of a new boiler and the unit is over ten years old, we quote both and talk you through the maths. The decision is yours, made with real numbers.
What does a typical repair cost?
Diagnosis and repair typically lands £130–£420 depending on the part. The price is fixed in writing before work starts.
Does London water make this more likely?
Frequently, yes. London runs 280 to 320 ppm off the chalk aquifer, and scale is the quiet cause behind a large share of the emergencies we attend, it narrows pipework, coats heat exchangers until a boiler overheats and locks out, and seizes the stopcock on the one night you need it to turn. Add pipework that in much of the city was last touched in the 1960s and the failures cluster in ways we can often predict from the postcode.
24 hours · 365 days · London

Water where it
shouldn't be? Call.

A person answers, not a menu. You'll have an arrival time and a price range before you hang up.

020 3674 8514

Or WhatsApp 07865 292684, photos help us bring the right parts

Our engineers