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London Manchester
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Planned work · London · from £110 first hour

Water Heater Repair in London

Point-of-use heaters, wall-mounted multipoints and immersion cylinders.

Get a fixed quote Or call 020 3674 8514
Water heater repair & installation in London
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

, the water heating nobody thinks about until the office kitchen or the annexe runs cold. Repaired or replaced with honest arithmetic.

What you get

Water heater repair & installation in London: what the price includes

  • 01
    Electric and gas units

    Instantaneous and stored, domestic and light commercial.

  • 02
    Immersion specialists

    Elements and thermostats swapped same-visit, the most common fix on this page.

  • 03
    Scale management

    In hard-water London, scale kills elements young; we descale and advise on protection worth having.

  • 04
    Like-for-like swaps

    Failed units matched and replaced without redesigning the wall.

  • 05
    Point-of-use, multipoint and storage all behave differently

    An under-sink 10 litre unit, a gas multipoint and a vented storage heater fail in completely different ways and take different parts. Telling us the make and the type on the phone is often enough for us to arrive with the part already on the van.

What this means in London

Local conditions we work around

Hard water is the defining fact for London heating. At 280 to 320 ppm, scale builds on the hottest surface in the system, which is the boiler heat exchanger, and every millimetre of it costs efficiency and shortens the life of the unit. It is why we flush before commissioning a new boiler, why we fit a scale reducer on the mains where the system warrants it, and why an unvented cylinder in London needs its annual service rather more than the manual implies.

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.

SloughAmershamRickmansworthFulhamKensingtonChelseaChiswickEalingHammersmithIslingtonCamdenClapham All London areas →
Straight answers

Water heater repair & installation in London, your questions

My immersion heater stopped, big job?
Usually an element (£110–£180 fitted) or a thermostat, and worth doing promptly: a failed stat that sticks on can boil a cylinder. If the water went scalding before it went cold, say so on the phone, that's the stat.
Repair or replace a multipoint heater?
Units under eight years usually earn a repair; older units with scaled heat exchangers rarely do. The maths is the same as boilers, repair under a third of replacement, repair wins.
Do you handle commercial units?
Yes, cafés, salons and offices run on multipoints and under-sink heaters; see the commercial pages for contract options.
My water is scalding then cold.
On a storage heater that is a failed thermostat or a spent element letting the top of the tank heat while the rest stays cold. On a gas multipoint it is usually flow-related, a scaled heat exchanger in London being the most common cause.
Repair or replace?
Elements, thermostats and valves are worth replacing on a sound unit. A leaking tank is not repairable, once the cylinder itself has perforated, replacement is the only honest answer and anyone offering to seal it is wasting your money.
Why does it take so long to reheat?
Either the element is scaled, the thermostat is set low, or the unit is undersized for how you are using it. The first is common in hard-water areas and is the cheapest of the three to fix.
How does London hard water affect heating work?
Considerably. Scale builds on the hottest surface in the system, which is the boiler heat exchanger, and every millimetre costs efficiency and life. It is why we flush before commissioning a new boiler here, why kettling is the most common noise complaint we get in London, and why an unvented cylinder in this city genuinely needs its annual service rather than nominally needing it.
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