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  1. ktilbury16

    3 port valve motor permantly on!

    Help! Pulling our hair out! Have a Worchester Bossch Boiler, Honeywell Programmer, thermostate, hot water thermostate. The 3 port MPV is is always hot to touch and the motor is always on even when the valve is closed and hotnwater/heating is off. The programmer, thermostate and MPV have all...
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