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  1. K

    Valiant system boiler, heating switch on when I switch on hot water otherwise not

    Sorry I didn't get why the plumber. here are some pics
  2. K

    Valiant system boiler, heating switch on when I switch on hot water otherwise not

    I have no clue, it is valiant eco tech plus 630. its connected with nest and have megaflow.
  3. K

    Valiant system boiler, heating switch on when I switch on hot water otherwise not

    Hello, I have Valiant system boiler. when I come from holidays noticed the pressure has been dropped. I have corrected the pressure but now new problem started. The heating switch on when I switch on hot water otherwise not.
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