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A Complete Guide to Gas Boiler Servicing Costs [and What Should Be Included]

Let’s get right to it.

For a standard service (not requiring additional parts and labour), anything under £60 is suspect, and anything over £100 is expensive.

When your engineer walks through the door. You’ll want to ask for his Gas Safe number and card. Cross-check those details here.

With a bit of luck, alongside some tools, the engineer will present something like this.

This example is the exact example used by the Gas Safe Register here.

It’s a legal requirement for a Gas Safe engineer to provide paperwork for Landlords, but not for homeowners.

Confirm with the engineer before-hand that they can bring a similar document with them (most plumbing merchants stock them).

Minimum expectations from a boiler service

Depending if you are a homeowner/landlord, you’ll expect this as a minimum on your certificate:

  • Details of any flue or appliance that has been inspected.
  • Details of the engineer (Gas Safe number, signature and name).
  • Homeowners address/Landlord’s name and address (sometimes, the agents name and address is used).
  • Any issue relating to gas safety and what type of action has or needs to be taken to fix the problem.
  • Test results for any appliance or flue tested. Flues will be tested with flue gas analysers and some will be able to print out results on site.
  • Any safety defect identified and any action required or taken to rectify it
  • Confirmation of the results of the operational safety checks carried out on the appliances.

Additional services you’ll want from your boiler service

  • A visual inspection of crucial parts in the boiler (i.e. removing the case and checking the pump, heat exchanger, burner and ignition). This is to check to wear and tear but also to check all parts meet minimum safety standards set by Gas Safe.
  • Where necessary, remove dirt and debris (usually from the flue to ensure there is plenty of ventilation.)
  • Check the boiler is operating at the correct pressure.
  • Use a Gas Analyser to inspect the gases being released from the flue and ensure they are within tolerance.

Factors that affect the cost of the service

Like a service for your car. A part service is cheaper than a full service.

If you want everything above completed on the service day (advisable) it’s going to be slightly more expensive than an engineer carrying out the bare minimum in terms of inspections.

Additional extras

There are various extras that are useful, to help protect your boiler. These include:

  • Addition of a magnetic system filter which will catch the debris running through your central heating system (and stop it passing through the boiler).
  • Adding central heating inhibitor which helps break up debris making it easier for the filter to catch it.
  • Hot flush or powerflushing service (pumps all the debris out of the system for systems having trouble with sludge build up).

What’s Next?

If you want further information, we’ve created an updated boiler service cost guide for boilers here.

Any questions? We’d be happy to answer them in the comments.

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