Common Boiler Problems & Repair Costs


Did you know your boiler is most likely to have a problem during the Autumn?

This is due to your central heating system being inactive during the summer months. But whenever a boiler failure occurs, it’s never ideal and always inconvenient. 

Experiencing an issue with your system? It may be one of these 6 common boiler problems: 

Pump failure 

Have your radiators suddenly stopped working, has your boiler become noisy or are you experiencing a leak from below your boiler?

If so, it’s possible these issues are caused by a problem with your central heating pump. Your heating pump is the heart of your system — taking hot water from your boiler and pumping it around your pipework — so, if it stops, no hot water and no heating. 

What’s happened? 

Many things can cause a pump failure, from the propeller on the pump getting stuck to air building up in the pump and causing an air lock. 

How much will it cost to fix? 

It’s likely to cost around £160 for a replacement pump, plus the cost of a boiler repair engineer to fit it.

Faulty circuit board 

Has your boiler lost power, is it working intermittently, are lights and/or numbers flickering or are there different fault code on the display panel?

If so, it’s possible the circuit board has developed a fault. 

What’s happened? 

Your circuit board failure could be caused by many things including dampness from a leak in the boiler or the circuit board developing a faulty relay are among the most common. 

How much will it cost to fix?

Depending on the type of boiler you have, a replacement circuit board is likely to cost upwards of £220, plus the cost of a boiler repair engineer to fit it.

Faulty boiler fan

Do you have a loud buzzing or tapping noise, air fault or fan fault code showing on your boiler? If so, it’s likely that your boiler’s fan is becoming faulty or has developed a fault. 

Your boiler’s fan is a critical component, as it pushes harmful gases through your boiler’s flue and out of your home safely. If your fan can’t do its job, your boiler will eventually cut out.

What’s happened? 

Your fan’s fault has probably been caused by the windings on the motor getting burnt out or the bearings having deteriorated. 

How much will it cost to fix?

The cost of a replacement fan will vary, depending on the model of your boiler. But you can expect to pay between £150 and £200 for the fan, plus approximately the same again for a boiler repair engineer to fit it.

Motorised valve failure 

Are your radiators not heating up? Have you found yourself with no hot water?

If so, it’s possible your boiler’s motorised valves have failed.

Your lack of hot water and heating could, of course, be caused by other problems with your boiler, including a drop in your boiler’s pressure.

So, before you call out an engineer, it’s always a good idea to check your boiler’s pressure is between 1 and 1.5 bars on the pressure gauge.

What’s happened? 

Like any moving part, the motorised valve in your boiler is subject to wear and tear. Replacing the motorised valve is a major job, as your heating system will need to be drained to remove and replace the part within the boiler. 

How much will it cost to fix? 

Expect to pay approximately £300 for your replacement motorised valve and for the boiler repair engineer to fit it.

Keep your heating running smoothly without any surprises – call us today to get started with one of our affordable boiler cover plans.