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Cheers for the help everyone nearly blew myself up, now the 3 way valve is working fine there is a god task

no it does not spring back,when i first installed it,it worked fine and you could move it manually very easily,now it is harder to move and does not return. when i remove the motor body the valve is easy to move again. do you think the motor has failed? the unit fitted is a SIEMENS LANDIS AND...

Hi everyone could anyone please help I have a gravity fed central heating system about 14yrs old. the boiler is a myson orion. I have instaled a new pump and a 3 way valve. when the hot water is turned on it works fine,with the room stat at 0 deg i then put the heating on, that works fine...