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  1. M

    Grundfos Pump running constantly

    Chaps, before/whilst I purchase a new PCB - i'm trying to get my head around why it would cause the pump to run when the boiler hasn't even been used for months. When a PCB is faulty, would/could it send wrong signals, or could it be a relay stuck or something so the pump is receiving the signal...
  2. M

    Grundfos Pump running constantly

    Thank you :) Ill have to look into a new PCB then! Thanks both you've been a great help
  3. M

    Grundfos Pump running constantly

    It's a baxi solo 2 pf Yes I heard it do something when I turned the power off. The lever constantly floppy though. :) cheers for your time
  4. M

    Grundfos Pump running constantly

    Many thanks for the reply Pete It has no resistance when the power is on (but heating and hot water off) Aside from the 3 port should the pump be constantly on? Or is this a result of the 3port Thanks :)
  5. M

    Grundfos Pump running constantly

    Good morning experts! My Grundfos pump is running constantly. I have it on the first setting, so it runs quietly, but I can hear it pumping water. I haven't used my boiler for months since it's obviously been summer. I thought the pump was on tickover and was meant to stay on 24/7.... until I...
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