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How often should a boiler be serviced?

An annual service checks the boiler, its flue and its safety devices, and your warranty may require it. It is not the same as a landlord’s annual gas safety check, though the two are often done on the same visit.

The answer

Service a gas boiler once a year, by a Gas Safe registered engineer.

Range: 12 months · checked 6 November 2026

12months

Typical interval

What changes it

  • Check whether your boiler’s warranty requires an annual service; many do.
  • If you rent, the landlord must arrange an annual gas safety check for the appliances they provide; it is separate from a service.
  • Older boilers, or one that has been losing pressure or making new noises, may need attention sooner.
  • The same annual rhythm applies to oil boilers; ask the engineer about the checks your model needs.

Do it

  1. Find a Gas Safe registered engineer and check the ID card when they arrive.
  2. Ask for the service record and keep it with the boiler documents.
  3. Book before the heating season, when engineers are less busy.
  4. Fit and test a carbon monoxide alarm if you do not have one.

Put it in your schedule

The maker opens with Boiler Service at every 12 months.

The maker counts the next date from this day.

No account. The maker keeps the job in your browser and in the link.

In the appThe app has no ready-made boiler job. Add Boiler Service as your own yearly job, or use the schedule maker here.

Why this interval

The sources below give the full picture. The factors above are the ones that move the interval for most situations.

The range is a starting point, not a rule for every situation. The factors above are the ones the sources name; if your situation is different, use the range and ask a professional where the job needs one.

If you want the job in a schedule with reminders, open the schedule maker with this job already loaded. The how often index has the other jobs.

Boiler Service questions

What changes the interval?

Check whether your boiler’s warranty requires an annual service; many do. If you rent, the landlord must arrange an annual gas safety check for the appliances they provide; it is separate from a service. Older boilers, or one that has been losing pressure or making new noises, may need attention sooner. The same annual rhythm applies to oil boilers; ask the engineer about the checks your model needs.

Does the app use this interval?

The app has no ready-made boiler job. Add Boiler Service as your own yearly job, or use the schedule maker here.

Where does this come from?

The answer is checked against 2 primary sources, linked under Sources with the date each was read.

Sources

The interval and the factors on this page are checked against these sources.

  1. Gas safety: home owners. Health and Safety Executive (HSE).An annual service by a Gas Safe registered engineer. Checked 6 November 2026.
  2. Gas safety checks: who needs them?. Health and Safety Executive (HSE).A landlord’s annual gas safety check, separate from a service. Checked 6 November 2026.
ImportantGas work is not a DIY job. If you smell gas, call the National Gas Emergency Service on 0800 111 999.