How Often and When Should I Get My Boiler Serviced?

A boiler is the heart of your home’s heating system — and just like a car, it needs regular maintenance to stay reliable and safe. One of the most common questions homeowners ask is:

1) How often should I get my gas boiler serviced?

You should service your gas boiler every 12 months.

This is in line with all major boiler manufacturers — Worcester, Vaillant, Ideal, Baxi — who require an annual service to keep your warranty valid.

This applies to all gas boilers:

• Combination boilers

• System boilers

• Heat‑only boilers

Why annual servicing matters

• Keeps your boiler safe

• Maintains efficiency

• Reduces the risk of breakdowns

• Keeps your manufacturer warranty intact

• Ensures compliance with legal requirements (especially in rented properties)

2) When is the best time to service your boiler?

You can service your boiler any time of year — but the best time is:

Late summer to early autumn (July–September)

Why this timing is ideal

• Engineers have more availability

• You avoid the winter rush

• Any issues are fixed before cold weather hits

• Valves and pumps often seize after months of inactivity — better to catch this early

• Your boiler runs at peak efficiency when you need it most

• You massively reduce the risk of winter breakdowns

Servicing your boiler in August or September is perfect — it’s the quiet season for heating engineers, and you get ahead of the winter demand.

Come December, heating engineers turn into gold dust. We often have to prioritise vulnerable customers and turn away new bookings entirely.