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    Valiant combi boiler HW ok CH not

    Namsag's description was perfect. Sure enough the cam wasn't disengaging. The spring wasn't pulling it off the microswitch. Half the time I turn water on, it sticks. So I guess I need to dismantle it to clean it. There are instructions in the manual which seem quite clear, although it looks...
  2. G

    Valiant combi boiler HW ok CH not

    OK more information ....It's a Valiant VCW GB242E combi boiler. Last night it was mild the heating thermostat had gone off, but boiler was still cycling. (Burner on for few seconds, then off for few minutes, pump on all time) So I turned off the CH, but cycling continued. There is a...
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    Valiant combi boiler HW ok CH not

    Valiant combination boiler is playing up. Hot water is working ok. (But seems much hotter than before, this happened since starting to use CH, could be related) Problem seen after hot water has been used. CH turned on, pump is on, burner fires up for 5 seconds, then stops. This repeats...
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