How Often Should You Service Your Boiler (And Why It Matters) 

by | May 30, 2025 | CORGI Trade Advice

Your boiler works hard behind the scenes to keep your home warm and your water hot-but when was the last time it had a proper check-up? 

Boiler servicing might seem like just another job on the to-do list, but skipping it could cost you more in the long run. Here’s everything you need to know about how often you should service your boiler-and why it’s so important. 

How Often Should You Service a Boiler? 

The simple answer: once a year. 

Most manufacturers recommend having your boiler professionally serviced every 12 months. In fact, it’s often required to maintain your warranty. 

“We recommend an annual service to ensure the boiler is working safely and efficiently.” 

Gas Safe Register 

Why Is Boiler Servicing Important? 

  1. Keeps You and Your Family Safe

Boilers that aren’t properly maintained can leak dangerous carbon monoxide (CO)-a colourless, odourless gas that can be fatal. 

  1. Catches Problems Early

A service can identify small issues before they become expensive breakdowns. Think of it like an MOT for your boiler. 

  1. Keeps Energy Bills Down

A well-maintained boiler runs more efficiently, which means it uses less gas and saves you money. 

  1. Maintains Your Warranty

Most manufacturers require a yearly service to keep your warranty valid. Miss one, and you could lose out on free repairs. 

  1. Helps Prevent Breakdowns in Winter

The last thing you want is a broken boiler when the temperature drops. A summer or early autumn service can ensure you’re ready for the cold. 

What Happens During a Boiler Service? 

A Gas Safe registered engineer will: 

  • Inspect and clean components 
  • Check gas pressure and flow 
  • Test for leaks and CO 
  • Ensure the flue is clear and safe 
  • Issue a service record for your files 

You can (and should) ask to see the engineer’s Gas Safe ID card. You can also verify them online at www.gassaferegister.co.uk 

When Is the Best Time to Book a Boiler Service? 

Late spring or summer is ideal. Engineers tend to be less busy, and it gives you time to fix any issues before winter. 

Signs Your Boiler May Need Immediate Attention 

Even if it’s not due for a service, book one if you notice: 

  • Strange noises (gurgling, banging) 
  • Water leaks 
  • Pilot light keeps going out 
  • Radiators not heating properly 
  • A yellow or irregular flame 

Final Thoughts 

An annual boiler service is a small investment that can save you a lot of money, hassle, and risk in the long run. It helps keep your heating system safe, efficient, and ready for whatever the weather brings. 

Sources: 

Gas Safe Register – Boilers 

Which? Boiler Servicing Guide 

HSE Gas Safety Info