Boiler Repair in Watford, Hertfordshire & London

£120 to £450+VAT typical

Gas Safe registered boiler repair. Engineer on site within 2 hours. No call-out fee. Price quoted before any work begins.

On site within 2 hoursPhone answered within 20 minutesNo call-out fee1-year parts guaranteeGas Safe registeredNo work over budget without your approval

What's covered

We repair all major UK domestic boiler brands. Gas, oil, electric, combi, system, and conventional. From blocked condensate pipes and ignition electrode failures to gas valve replacements and heat exchanger issues.

Most common fault codes — Vaillant F22, F27, F29, F62, F75, Worcester E9 — have dedicated diagnostic guides. Check yours before you call to see whether it's a self-fix or needs a Gas Safe engineer.

Brands we repair

Vaillant
Worcester Bosch
Baxi
Ideal
Viessmann
Potterton
Glow-worm
Main
Alpha
Ferroli
Vokera
Ariston

+ all other major UK domestic boiler brands

Boiler repair pricing — 2026

Standard call-out and travel included. Prices exclusive of VAT. The price you agree is the price you pay.

This page

Typical repair

£120 to £450

+VAT — diagnosis dependent

Out of hours

Emergency (OOH)

£180 to £600

+VAT — priority response

Labour rate

£89 to £168.50

+VAT per hour

Call-out fee

FREE

Travel always included

All prices exclusive of VAT. Ranges reflect typical jobs. Final price quoted before any work begins.

How we work

Five steps. No surprises. No pressure.

1

Call or book

Phone answered within 20 minutes. Free quote form.

2

Engineer arrives

Gas Safe engineer on site within 2 hours.

3

Free diagnosis

We check, explain, and quote a fixed price.

4

Work done

Most jobs completed first visit — common parts on the van.

5

Guaranteed

1-year parts guarantee on everything we fit.

Where we cover

We work from our Watford HQ across Hertfordshire and North London. Further afield is quoted separately.

Primary service areas

Boiler repair FAQs

How quickly can you get to me?

Gas Safe engineer on site within 2 hours. Phone answered within 20 minutes. We cover Watford, Hertfordshire, North London and Middlesex from our Watford HQ. Further afield is quoted separately.

How much does a boiler repair cost?

Typical boiler repair costs £120 to £450 plus VAT, depending on the fault. Out-of-hours emergency repairs £180 to £600 plus VAT. We diagnose the fault first and give you a fixed written quote — the price you agree is the price you pay.

Is there a call-out fee?

No. Our standard call-out and travel are included in the price. You only pay for the work — and we quote before we start.

Do you guarantee the work?

1-year parts guarantee on everything we fit (manufacturer-backed where applicable). Labour is backed by our workmanship standards — if a repair does not resolve the fault, we return and fix it.

Are you Gas Safe registered?

Yes — we are Gas Safe registered engineers. We only carry out gas work we are qualified for, and we provide documentation for landlord CP12 certificates where required. We are also OFTEC registered for oil boiler work.

Which boilers do you repair?

All major UK domestic boiler brands — Vaillant, Worcester Bosch, Baxi, Ideal, Viessmann, Potterton, Glow-worm, Main, Alpha, Ferroli, and more. Gas, oil, electric, combi, system, and conventional.

What if you need to order a part?

We carry common spare parts on the van, so most repairs are completed on the first visit. If a specialist part is needed, we can usually source it the same day.

Could the final price be more than the quoted range?

For a standard boiler repair, no — once we have diagnosed the fault and given you a written quote, the price you agree is the price you pay. If, while working, we discover an unforeseen issue or an unsuitable part on the system, we always (1) clearly explain it, (2) quote any additional work separately, and (3) get your approval before doing it. No work exceeding the original budget is ever undertaken without your consent.

Boiler not working? Don't wait.

Engineer on site within 2 hours. Phone answered within 20 minutes. No call-out fee.