Boiler servicing: why, when and what it includes
Practical advice for owners and managers of a property.
Key takeaways
  • Servicing checks combustion, safety devices and the flue.
  • How often depends on the fuel, the appliance and your region.
  • Prepare the last report and any faults you have seen.

What is servicing for?

It checks that the appliance burns correctly, that the safety devices work and that the flue and condensate drain are clear. It also spots wear before it becomes a breakdown, often at the worst moment: in the middle of winter.

What the visit includes

The engineer checks the general condition, cleans the accessible parts, checks combustion and safety devices, looks at the water circuits and pressure, then explains the findings. The exact content varies with the type of appliance and its fuel.

How often?

It depends on the fuel, the type of appliance and the rules in your region. Your engineer tells you what applies to your equipment. Either way, a regular check beats a service forgotten for years.

How to prepare

Find the last report or certificate, note any faults (noises, codes, pressure drops) and leave clear access to the appliance. This information lets the visit get straight to the point.

When to call a professional

  • You no longer know when the appliance was last checked
  • The appliance is noisy or restarts often
  • Before winter or a letting

Frequently asked questions

Is servicing compulsory?

Depending on the fuel, the type of appliance and your region, a periodic check may be required. We tell you what applies.

How long does servicing take?

It depends on the appliance and its condition. The duration is stated when you book.

What if my appliance shows a code during the service?

Note it: it helps the diagnosis. You can also see our error-code guide by brand.

The right next step

Observe the symptoms, avoid risky handling and note what changes. For a recurring problem or a renovation project, an on-site diagnosis lets you choose a suitable solution rather than a temporary fix.