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Grant boiler running issues

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  • Grant boiler running issues

    Hi all, I'm after some advice if possible. I have a Grant Vortex Utility Boiler, running at the factory setting of 23bar, 78,475 BTU, it's a kerosene boiler.
    Last few days I have noticed its running a bit rough, from outside the building by the flue, it sounds as if its firing/stopping/firing and continues doing it. After looking at the burner, it lights, does the heating etc, but sounds like its stop starting when it's actually continuously running.
    I have removed the photo cell, it's clean, and when the boiler is running and I remove the photocell and cover it up, the boiler stops as I would expect.
    I'm wondering if the solenoid on the oil pump is working correctly as it sounds as if its chattering?
    Normally I would get a qualified engineer to look at it, but being a factory maintenance engineer and have some experience with oil boilers, I need to have a go at it as its a bank holiday weekend!

    Any advice would be a great help, thanks.

  • #2
    Is the burner pulsing on and off and what type of flue system have you got?
    RDB Burner solenoid coils are usually very reliable, could still be a problem with PE cell even if it is clean.


    • #3
      Thanks for the reply.

      Managed to get it going this morning, turned out to be a faulty oil pump. When I removed the nozzle to have a look again, I could see metallic deposits in the base of the jet holder so it was a good clue that the pump was damaged.
      After fitting the new pump and nozzle, and set it up, I opened the old pump.
      The small driven gear was fractured, it was probably sticking momenterally causing the pulsing, with probably reduced flow too. The pump casting had worn a bit, so that's where the metallic deposits were coming from.
      All running well now


      • #4

        Have you checked the TMV?
        emergency plumber