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thanks for the advice. is it possible that the vave motor is working but voltage is not passed to pump/boiler. I think a new valve might be on the cards. The valve is a BGMVSR 23 i think british gas. can i can a new head or will i have to buy the complete valve or does another make motor...

ch has just stopped working. i have the programmer set to continuous and hw to timed. i then use the thermostat to control the ch on/off. however the heating will only work now if both hw and ch are set to continuos. i have checked the 3 port valve and the level moves to ch when ch continuos...