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  1. E

    Baxi 105e pressure loss

    Nothing is coming out of PRV, there are no visible leaks on the central heating system (it's been doing it for a while now so a leak would have been visible by now), there are no leaks from the boiler and when the isolating valves for the ch flow and return on the boiler are shut, it still loses...
  2. E

    Baxi 105e pressure loss

    I have a baxi 105e combi. The pressure keeps dropping to zero overnight when the boiler is not in use. An engineer replaced the expansion vessel and no leaks can be found on the central heating system but the problem persists. Any ideas?
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