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Boiler servicing

Looking after your boiler could save you in the long run

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Should I get my boiler serviced?

Getting your boiler serviced periodically means it's less likely to let you down in winter.

Poorly functioning boilers are costlier to run, so getting yours serviced can save you money in the long run.

You should aim to get your boiler serviced once a year, especially because not doing so will invalidate some boiler warranties.

Technician servicing a boiler

How much does boiler servicing cost?

A one-off boiler service costs around £100, but this depends on the type, model and age of the boiler. An annual boiler service is included in most boiler cover plans, as well as replacement parts and repairs.

  • icon of flame

    Gas boiler

    A gas boiler service usually costs between £80-£120.

  • Oil icon

    Oil boiler

    Oil boilers can cost anything between £75-£180 to service.

  • Combi dual icon

    Combi-boiler

    For combi-boilers, a one-off service costs between £70-£120.

  • icon boiler

    Biomass boiler

    A one-off service for a biomass boiler ranges between £180-£200.

Do I need to get my boiler serviced?

Boilers are most likely to fail in winter, when you rely on them most. A yearly service, ideally in summer or autumn, helps keep yours running safely and efficiently, including checks for carbon monoxide risks.

While a service costs money, it can save you more by catching issues early and preventing expensive repairs or replacements. A well-maintained boiler also uses less energy, lowering your bills.

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Common boiler problems

  • Low or high boiler pressure that keeps on dropping or rising

  • Strange sounds like ticking, knocking, or clanking

  • Leaks

  • Kettling (making a noise like a boiling kettle)

  • Boiler keeps switching itself off

  • Frozen condensate pipe

Warning signs

  • Yellow or orange flame

    The flame colour of your boiler’s pilot light is yellow or orange, rather than a healthy blue. This could be a sign of poor combustion.

  • Black marks

    Black marks on or near your boiler could show your flue is leaking, or your boiler has electrical problems.

  • Unexpectedly high gas bill

    Your bills show gas usage that’s too high or higher than usual. This could mean your boiler is burning more gas than necessary.

  • Pilot light keeps going out

    If your pilot light keeps going out that is a major safety issue.

Who can service a boiler?

For gas-fired boilers a Gas Safe-registered engineer, for oil-fired boilers an OFTEC-registered engineer is required. An annual boiler service carried out by an appropriate engineer is included in boiler cover offered by:

  • British Gas

  • PlusHeat

  • YourRepair

  • Home Emergency Assist

  • 24/7 Home Rescue

  • ScottishPower

  • HomeTree

  • Warmzilla

What’s included in a boiler service?

A boiler service can include:

  • Checks on the flue (both inside and outside)

  • Tests on gas and pressure-flow

  • Checks of water and gas pipework

  • Checks on case seals

  • Checks on all electrical connections

  • Checks for any corrosion or leaks

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