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On the program wires of the left pair I get 240 on the right pair (red circle) I get 000 On the Thermostat on Red to Blue I get 000

Hi - Firstly thanks all for the support. I have taken the following readings from the valve white & blue: Both off = 000 Heating only = 000 Water only = 024 ---------------------- Water on then Heat = 024 Heath then water = 024 ---------------------- Heat and water then water off =...

Hi - I am going to get one in the next hour or so. Yes I work on big computer server system so have experience.

Yes the Thermostat does click on and off to what seems the current temperate of the room that it is in

Thanks - Silly Question but never read from a system like this. How do I read from the white wire? (want to avoid wasting time so rather ask than mess around getting false results or short it)

Its a fair point - I will be getting one today. When I have one what can I test? Some photos of the wiring. Thermostat: Controller mount: Wiring box:

Hi, System: Thermostat = Honeywell T40 Controller = Drayton LP522 3 way Valve = Drayton MA1 Boiler (3 yrs old) = Vailliant Ecotec 428 Issue: System been working for 3 years fine but now no central heating working but water is normal, the boiler reports S.30 'No heating demand...