Boiler Repairs
Boiler Repairs in London
Same-day emergency call-outs available
Fixed-price diagnostics, transparent quotes and Gas Safe engineers.
Boiler not firing up, leaking, losing pressure or making strange noises? Ninja Boilers' Gas Safe engineers offer fast, reliable boiler repairs across London — usually with a same-day visit.
Free, No-Obligation Quote
Get a Free Quote
Tell us about your boiler — we'll come back with a fixed quote.
What we fix
Every common boiler fault — sorted
From pressure drops to ignition failures, our engineers carry parts for all major brands so most repairs are completed on the first visit.
No Heating or Hot Water
Diagnose and repair faulty diverter valves, thermostats, pumps and PCBs to restore heat fast.
Leaks & Pressure Loss
Locate and repair leaks, replace pressure relief valves, and re-pressurise your system safely.
Noisy or Locking-Out Boilers
Fix kettling, gurgling and fault-code lockouts — including F22, F75, EA and similar error codes.
Real peace of mind, round the clock
London's trusted boiler repair team
Our dedicated support team is available day and night to dispatch engineers when you need them most. Whether it's early morning or late at night — you'll always speak to a real person, not an answering machine.
- Same-day appointments available 7 days a week
- Fixed-price diagnostics — you'll know the cost before we start
- 12-month guarantee on every repair we carry out
- All boiler brands covered — Worcester, Vaillant, Ideal, Baxi and more
Our Process
A simple, hassle-free journey
- 01
Call Us
Tell us the symptoms and any fault codes — we'll book you in fast.
- 02
Diagnose
Our engineer arrives, runs a full diagnostic and quotes a fixed price.
- 03
Repair
Most repairs are done on the same visit using van-stock parts.
- 04
Test
We fully test heating and hot water before we leave site.
- 05
Guarantee
Every repair is backed by a 12-month parts and labour guarantee.
Why Choose Us
Why Londoners trust Ninja Boilers for repairs
Gas Safe registered engineers
Fixed-price, no-surprises pricing
Same-day & emergency call-outs
12-month guarantee on every repair
All major boiler brands covered
Family-run, locally based service
FAQs
Frequently asked questions
Boiler broken? We'll fix it today.
Call 020 3576 5825 for a same-day Gas Safe engineer across London.