Boiler Repairs London — 24/7

Boiler repair in London typically takes 1–2 hours once a Gas Safe–registered engineer has diagnosed the fault, charged at our standard rate of £150/hr + VAT with no separate call-out charge. Most breakdowns — low pressure, ignition failures, leaking valves or sensor faults — are fixed on the same visit, with emergency response available 24/7 across Central London.

Why boilers break down — and how we diagnose them

Most boiler faults fall into a handful of categories: pressure loss from a slow leak or a worn internal part, the boiler failing to fire up, and sensor or circuit-board faults that make the boiler shut itself down as a safety measure. Warning signs worth checking before you call include the pressure gauge reading (it should sit between 1–1.5 bar), any visible dripping around pipework, and the error code shown on the boiler's display.

A common misconception is that a boiler making noise or losing pressure occasionally is "normal" — it isn't. Both are early indicators of a developing fault, and left unaddressed they typically cause more expensive damage, such as a cracked heat exchanger from repeated pressure cycling. If your boiler is showing a fault code, refuses to ignite, or you smell gas, this is when professional help is required rather than DIY troubleshooting.

London's period townhouses in Mayfair, Belgravia and Knightsbridge often run premium brands such as ATAG, Vaillant, Viessmann or Keston — high-efficiency systems that require specialist knowledge to diagnose correctly. Our engineers are trained across all major manufacturers and carry a comprehensive stock of parts, enabling first-visit fixes in the vast majority of cases.

Preventative maintenance — an annual service, a periodic power flush, and prompt attention to small leaks — is the most effective way to avoid emergency call-outs altogether. Beyond repairs, we also carry out annual servicing, Gas Safety Certificates (CP12), full safety testing, and complete replacements where a repair is no longer worth the cost.

Common boiler issues we fix

Brands we service & repair

We carry parts for all major brands and have specialist knowledge in premium boilers common in prime London properties.

How much does a boiler repair cost?

We charge our standard hourly rate with no separate charge for attending — the hourly rate covers everything from arrival. Parts are quoted transparently before any work begins, so you'll never receive a surprise invoice.

Boiler fault guides

Recognise one of these symptoms? Our detailed guides explain the causes and what our engineers check first.

Questions customers ask before booking