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  1. H

    Glowworm 30sx losing pressure

    Thanks for the reply. I've checked the EV and that is fine - blowing air. When the boiler is isolated it is holding pressure which would indicate problems within the system. Which is the bit I'm struggling with! Trying to isolate the fault to the water or heating loops.
  2. H

    Glowworm 30sx losing pressure

    I've read through existing posts but need some clarity before I go insane! Pressure overflow was leaking for a few days and so had an engineer come out at the weekend. He has replaced a couple of boiler parts but now the system is losing pressure and needs topping up constantly. This...
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