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a big huge thankyou to seco services & bluemoonmole for your fantastic assistance i changed the motor head unit today and all now working perfectly. the lever that pushed against the micro switch on old unit seemed to be a long way off the switch. looks like the lever had seen better days. a...

brilliant reply, most helpful. i think i will probably go for a new motor unit complete as the old one is very rusty and knackered looking at not sure if the return spring is 100 percent, covers a bit loose as well. i'l nip down the plumb centre in the morning ( i will go for the easy option and...

many thanks i am guessing the micro switch is part of the motorised valve unit? i think i can buy a new motor unit (less valve)and replace? (i have travelled back from Colchester today. is it still cold up there?)

i have a central heating system, wall mounted gas boiler downstairs, hot water tank upstairs and header tanks in the roof. the heating system has two honywell motorized valves, two port that both look a little old.one valve for hot water and one for central heating The hot water heats fine...