Boiler repair

Boiler stopped working? Get it repaired in Bristol.

No heating, no hot water, low pressure or an error code on the display. Tell us what is happening and a local engineer will be in touch.

Breakdowns and lockouts
Low pressure and leaks
Repair or replace, explained

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Boiler repair

Getting your boiler fixed

Most repairs start with the symptoms. The make, model and any error code often point an engineer to the right part before they arrive, which can save a second visit.

A condensing combi boiler with its casing removed, showing the heat exchanger, fan and wiring.

Common boiler problems

These are the faults people describe most often. Each one narrows down where the problem is.

No heating or no hot water
Pressure that keeps dropping
An error code or a lockout
Radiators cold while the hot water works
Banging, gurgling or kettling noises
A frozen condensate pipe in cold weather

Close-up of the digital display and control buttons on a gas combi boiler.

What to tell the engineer

The make and model are on a label behind the front flap or under the boiler. Add any error code on the display, what still works and what the pressure gauge reads.

If only the radiators are cold, radiators cold but hot water works covers the likely causes.

A modern gas boiler with a round display hung on a kitchen wall beside a window.

Repair or replace?

If your boiler is old, out of warranty and needs a major part, replacing it can make more sense than repairing it. The engineer should set out both options with prices so you can choose.

If it comes to that, our boiler installation page explains what a replacement involves.

A woman pressing the test button on a carbon monoxide alarm fixed to a wall.

If you smell gas

Call the National Gas Emergency Service on 0800 111 999 straight away, open the windows and leave the boiler alone. Do the same if a carbon monoxide alarm sounds, and get everyone outside into fresh air.

How it works

How a boiler repair works

Clear steps from the first message to a working boiler.

Describe the fault
The make, any error code and what the boiler is doing now.
An engineer gets in touch
A local engineer who covers your postcode contacts you to arrange a visit.
Diagnosis and a price
They find the fault and price the repair, or set out a replacement if that makes more sense.

FAQ

Boiler repair questions

Quick answers to the questions people ask when their boiler stops.

Can't find your question? Contact us

My boiler has lost pressure. Is that serious?

It means water has left the sealed system, through a leak or a failed expansion vessel. Topping it up is a short-term fix. If the pressure keeps dropping, it needs looking at.

Should I keep resetting it?

A boiler that keeps locking out is protecting itself from a fault. Resetting it over and over hides the symptom without fixing anything. Note the error code and include it when you get in touch.

Can I get a price before an engineer sees it?

The fault has to be found first. The engineer prices the repair once they know what is wrong.

Is it worth repairing an old boiler?

Often it is, for a small part on a boiler in good condition. If a major part has failed on an older boiler, ask for a replacement price as well and compare the two.

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