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When connecting a honeywell 4043 motorised valve the boiler rcd shut off the electrical supply. This seemed to be related to connecting the brown wire from the valve which connects to the room thermostat. Potentially offending wire is isolated but rcd still trips. Is there any way of resetting...

Would a sticking motorised valve be sufficient to trip the boiler rcd? Is there a way of resetting the boiler. The background is that I replaced the head on Honeywell v4043h motorised valve controlling the central heating with a second hand one because the previous head was making a dreadful...