Emergency Boiler Repair in London — Same-Day, Gas Safe

A boiler emergency is any breakdown that leaves you without heating or hot water, or where the boiler is leaking, banging, or repeatedly cutting out. If you recognise your symptom below, call us rather than waiting.

• No heating or hot water anywhere in the property
• Boiler not working — won't fire up, won't ignite, or shows a lockout code
• Boiler making a banging, gurgling or whistling noise
• Boiler keeps turning off shortly after starting
• Boiler losing pressure repeatedly, even after repressurising
• A leaking boiler, dripping water from underneath or around pipework

Call 07460 824073 and we'll get an engineer on the way.

Most "boiler not working" calls in London turn out to be one of five things: low pressure, a frozen condensate pipe, a faulty thermostat, an ignition fault, or a worn thermocouple. A Gas Safe engineer can usually tell which one it is within minutes of arriving, often just from the fault code shown on the display.

• Low system pressure — the boiler locks out below its minimum threshold
• A frozen condensate pipe — common outside in cold spells, causes a sudden shutdown
• A faulty thermostat or programmer sending the wrong signal
• An ignition fault — the boiler tries to fire but won't light
• A worn thermocouple or sensor tripping the safety cut-out

Losing pressure usually means a small leak somewhere in the system, or air trapped in the pipework after bleeding a radiator. A boiler that needs repressurising every few days, rather than every few months, points to a genuine leak that needs finding and fixing rather than just topping up.

For the full step-by-step walkthrough on checking and repressurising your boiler yourself, see our guide to boiler losing pressure. If the pressure keeps dropping despite repressurising, that's a sign of a leak — call us for a same-day diagnosis.

A banging or gurgling boiler usually means trapped air or limescale build-up in the heat exchanger or pipework; a boiler that keeps turning off is most often low pressure or a faulty thermostat tripping the safety switch. Neither is normal, and both tend to get worse rather than resolve on their own.

Whistling or kettling noises are a classic sign of limescale restricting flow — common in London's hard-water areas — and are worth having looked at before the boiler cuts out completely.

We're based at 255-259 Commercial Rd, E1, and reach most of East and Central London — Tower Hamlets, Hackney, Islington, Newham, Southwark and Canary Wharf — within the hour, any time, day or night. Boroughs further out from Commercial Road usually still get a same-day engineer rather than a next-week booking slot.

Every callout includes a full diagnostic check, the repair itself where parts are carried on the van, and a Gas Safe certificate for any work carried out on the gas line. Common parts replaced on the day include the PCB, pump, thermocouple, diverter valve and pressure relief valve.

If a part isn't carried on the van because it's specific to your boiler model, we'll tell you on site and source it as quickly as possible rather than leaving you waiting without a plan.

If your emergency is a burst pipe, blocked toilet, or leak that isn't boiler-related, our emergency plumber page covers the wider range of plumbing call-outs we handle 24/7 across London. This page is specifically for boiler and heating breakdowns.

If you smell gas, turn off the supply at the meter, open windows, and call the National Gas Emergency number on 0800 111 999 immediately — then call us on 07460 824073 to fix the fault once it's safe to do so. Don't try to relight a boiler or use electrical switches near a suspected gas leak.

Cost depends on the fault and which parts are needed, so we don't publish a fixed price list or give a figure over the phone before we've seen the boiler. Every job gets a free, no-obligation quote before any work starts. For emergency call-outs, a fixed call-out fee applies — you'll know about it before anyone is dispatched. For a fuller explanation of how we price jobs, see our pricing page.