What to check if a boiler is working but with burner pulses?

If an oil boiler is working but with burner pulses, a heating engineer should check the following. Please note, it is important to always isolate the electricity supply to the boiler before working on the boiler. 

  • Check if there is insufficient air supply - check the air damper setting and the condition of the fan.
  • Check room ventilation is adequate - please refer to the Boiler's Manual for further support here.
  • Check the nozzle size and type.

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