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Hi Mick-if both HW and CH are manually switched on the radiators stay cold the boiler is lit and the HW is heated but no radiator output. how can i check the thermostat is sending a signal? I know its getting a live feed and the contacts move when its adjusted and i can see it working...

Its 1 -3 way I think its a drayton lifestyle mid position valve. How can i check its working?

motorised valves - hmm I will check later and let you know- thanks for the response.

Hi all - I have searched your forum and seen various issues with the system that I have but none seem to be exactly the right answer for me. Problem:- system age is 8 years - no issues to date at all untill now. Timer advance button and programmed action fails to make boiler ignite on CH...