Gas Safe
Wokingham Plumbing

Boiler Servicing / Maintenance



What MSB Plumbing and heating will do in our Boiler Service!


To Ensure the continued safe and efficient operation of your appliance, It is recommended that it is checked and serviced at regular intervals. The frequency of servicing will depend upon the particular installation conditions, but in general we recommend once per year is sufficient . It is the law that any servicing work is carried out by a competent person on the Gas Safe Register. All Boiler Servicing must be carried out following the procedures from the Manufactures servicing instructions, but below is just a quick guide of what boiler servicing involves: (Please note every appliance has different servicing instructions and must be followed Manufacturers' instructions often have many more steps to follow)



Preliminary examination:


  • Check with customer whether there are any problems with the system.
  • Check the appliance location is suitable for the type of appliance.
  • Check the appliance for any damage before starting work on it.
  • Check for correct operation of the appliance, including consumer controls and the safety devices.
  • Check the flame for correct burning.
  • Check the electrical wiring complies with electrical regulations.
  • Check for correct clearances from combustible materials.
  • Examine gas supply Pipework for correct installation and clearances.
  • Check for correct ventilation to the room containing the appliance.


Service procedure:


  • Remove main burners, clean and inspect for damage.
  • Clean and inspect gas injector(s).
  • Dismantle and clean pilot assembly and gas injector.
  • Reassemble burners and pilot assembly.
  • Check condition of ignition leads and electrode.
  • Clean the heat exchanger.
  • Refit burner assemblies and check seals.
  • Test disturbed gas joints for leaks.
  • Check appliance case and seals (where appliance is room-sealed) for damage and correct assembly.
  • Check and adjust pilot flame.
  • Check operation of thermocouple (flame supervision device).
  • Measure gas pressure and flow rate, and adjust if necessary.
  • Inspect/test flue for faults/correct operation.
  • Inspect flue terminal for correct location and protection.
  • Check system bypass valve (if fitted) is correctly adjusted.
  • Check sealed system (if fitted) is at correct pressure.
  • Advise user to have the system checked at least every twelve months or as specified my manufacturer.
  • Advise user of any defects found in writing.
  • Apply the Industry Unsafe Situations Procedure if necessary.


A boiler service takes about an hour. A gas fire usually takes around the same amount of time because the flue/chimney system needs to be inspected thoroughly.