Boiler Repair

A faulty boiler is more than an inconvenience — in winter, it is a genuine emergency. The UK sees over 1.7 million boiler breakdowns annually. The key to minimising inconvenience is fast, accurate diagnosis by a Gas Safe registered engineer who carries the right parts for your boiler model.

What is included

Same-day repairs available
All makes and models
Annual servicing plans
Gas Safe certified

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Gas Safe Registered Avg. response: 12 min 4.8/5 from 2,847 reviews

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Boiler Repair

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What is Boiler Repair?

Boiler repair covers diagnosis and rectification of any fault with your gas boiler or central heating system. Common faults include ignition failure, pressure loss, pump failure, diverter valve issues, PCB faults, and heat exchanger blockages. Most repairs can be completed on the first visit if the engineer carries the right parts — which is why using an experienced local specialist matters.

When Do You Need Boiler Repair?

No heating or hot water

Boiler firing but radiators not heating up

Pressure gauge reading below 1 bar or above 3 bar

Boiler displaying a fault code or error light

Banging, whistling, or kettling noises from boiler

Pilot light keeps going out

Boiler cutting out repeatedly — lockout mode

Radiators cold at top but warm at bottom — needs bleeding

What the Service Involves

1Visual inspection and fault code analysis
2Gas pressure and flow rate checks
3Component testing — pump, PCB, sensors, diverter valve
4Flue and combustion analysis
5Identification of faulty component
6Replacement of part and full system test
7Pressure check and recommissioning
8Advice on preventing recurrence

What Affects the Job?

—Nature of the fault — minor vs major component failure
—Part availability — common parts vs specialist components
—Age of boiler — older models may require sourcing obsolete parts
—Whether a powerflush is needed alongside the repair
—Time of call-out — emergency rates apply out of hours
—Labour time — complex faults take longer to diagnose and fix

Frequently Asked Questions

Why does my boiler keep losing pressure?

The three most common causes are a small leak somewhere in the system (check radiator valves and visible pipework), a faulty pressure relief valve, or a failing expansion vessel. A Gas Safe engineer can diagnose this on the first visit.

Is it worth repairing an old boiler?

As a rule of thumb, if the repair cost exceeds one year's worth of the efficiency savings a new boiler would deliver, replacement makes more sense. For boilers over 12 years old with a major fault, replacement is usually more economical.

My boiler shows a fault code — what does it mean?

Fault codes vary by manufacturer. Common ones: E1/F1 usually indicates ignition failure, E2/F2 is often a sensor fault, E9 is an overheat lockout. Share your boiler make, model and fault code with our team and we can advise before the engineer arrives.

How can I prevent boiler breakdowns?

Annual servicing is the single most effective preventive measure — it catches developing faults before they cause a breakdown. Also ensure your system has a magnetic filter fitted (removes sludge that damages the heat exchanger) and keep boiler pressure between 1-1.5 bar.