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I don't have a multi meter but the bit which I think has the motor in is completely sealed. I tried squirting the moving mechanical dial with wd40 but it made no difference. I resorted to buying a new unit and used the existing back plate and it works fine now. Thanks for the advice though

The Drayton SM2 timer for my boiler is not working properly. The water and central heating controls light up and work fine when activated but the mechanical timer part has stopped working. I've removed it from it's back plate and all connections seem fine. I took the back off the unit itself and...