Boiler repair
When your heating or hot water stops, you need an honest diagnosis without runaway hourly bills.
Our £120 diagnostic visit pinpoints the exact root cause of the fault. If parts or further labour are required, we give you a fixed written price before starting any repair. From sudden leaks and pressure drops to ignition faults and faulty pumps, we get your home warm again safely.
Diagnostic Visits
Boiler repair visits starting from £120
Our £120 diagnostic visit covers the first hour on site with specialist testing gear to pinpoint the root cause. If replacement parts or further labour are needed, we provide a fixed written quote before any repair work starts.
COMMON BOILER PROBLEMS
From sudden leaks and error codes to cold radiators and dropping pressure, select your symptom below to see what usually causes it and what our engineer will test on site.
What our engineer tests on site:
How it works
No guessing, no open-ended hourly meters, and zero surprise fees. You stay in full control from the initial fault-finding visit to the final test.
Call any time — we answer 24/7 — or book online. Tell us the fault code if one is showing.
You get a morning or afternoon slot, with a call 30–60 minutes before we arrive. We check the fault properly and agree the repair price before work starts.
We repair where possible, test everything properly and guarantee our labour for 12 months.
Up to an hour on site with specialist diagnostic gear to pinpoint the root cause. If parts or further labour are needed, we provide a fixed written quote before any repair work starts — no pressure either way.
Transparent pricing
Our £120 diagnostic visit covers attendance and the first hour on site with specialist testing gear to pinpoint the root cause. If parts or additional labour are needed, we provide a fixed written quote before any repair work starts.
Standard core slot
£120
First-hour attendance & diagnosis
Then £100/hr thereafter
Weekend Daytime
£160
First-hour attendance & diagnosis
Then £130/hr thereafter
Evenings & Late Calls
£180
First-hour attendance & diagnosis
Then £150/hr thereafter
Priority / Emergency
£220
First-hour attendance & diagnosis
Then £170/hr thereafter
Our reviews
Our core values enable us to provide professional and honest services to our customers. From boiler servicing in Ealing to heating repairs in Queen's Park, our customers choose us repeatedly because we're friendly, tidy, reliable and easy to deal with.
“Finally a plumber we can trust. Works quickly, tidily, and at a really fair price. Have cancelled our British Gas contract!”
“I thank my lucky stars to have found Happy Heating! Adam was amazing, sorted our problem quickly, and left the place spotless.”
“Really helpful, great communication, understood urgency and worked at short notice for a fair price. So glad I chose Adam.”
“I am so relieved to have found Adam. Finding a good, reliable heating engineer in London is honestly like finding gold dust.”
“Had a boiler fault no one else could diagnose. Adam found the issue quickly and repaired it for a reasonable price. 10/10!”
“Great service from Adam and a very reasonable price. Friendly, punctual, and highly recommended!”
“Adam was incredibly professional. Carried out both of our Landlord CP12 gas certificates quickly and without hassle.”
“Adam is always friendly and professional. He does a great job every time on our annual boiler service. Highly recommend.”
AREAS WE COVER
One postcode, one form. Tell us where you are and we will confirm before you give us anything else.
Type your postcode in and the checker tells you straight away whether we cover your area. If we do, you fill in the service you need and the best time for us to call.
Enter your postcode below to confirm coverage. If you're in our West or North West London area, it unlocks the booking form right away.
No upfront payment. We only use your details to confirm your appointment.
Hover or focus an area to highlight it on the map.
Comprehensive Heating & Plumbing
Every home and heating system is slightly different. Whether you have an older boiler in a Victorian terrace, a modern combi in a flat, or need safety certificates for a rental property, we always quote clearly upfront and do the job properly.
Urgent 24/7
Fast dispatch for sudden breakdowns, complete loss of heat or frozen pipes.
Prevention
Prevent unexpected winter lockouts and keep combustion running clean.
Replacements
Modern A-rated Worcester Bosch and Vaillant boilers with 10-12 yr warranties.
Monthly Cover
Full annual service, priority emergency dispatch, and maintenance cover.
Frequently asked questions
Got questions about what our £120 diagnostic covers, van parts stock, or out-of-hours callouts? Here are clear, upfront answers so you know exactly what to expect before booking.
Our £120 diagnostic visit covers engineer attendance and the first full hour on site with specialist testing gear to pinpoint the root cause. If replacement parts or further labour are needed, we provide a fixed written quote before any repair work begins.
We answer calls 24/7 and offer same-day or next-day weekday arrival slots across West and North West London. You receive a morning or afternoon window, with a courtesy call 30–60 minutes before your engineer arrives.
We repair all major domestic gas boilers, including Worcester Bosch, Vaillant, Ideal, Baxi, Potterton, Glow-worm, and Viessmann. We carry common replacement parts and universal seals on our vans.
Yes. All our repair labour comes with a 12-month guarantee, and any genuine manufacturer parts fitted carry their full manufacturer warranty.
If your boiler is too old or costly to fix safely, we give you honest advice and clear options. We never push unnecessary replacements, but if a new boiler makes better financial sense, we can provide a fixed written installation quote.