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THANKYOU all whom helped me here. I have tested the voltage and changed the junction box as a result and now have it all up and running!!! CHEERS!!!!!!!!

When i turn on the CH the light comes on at the programmer but nowt happens. I'll have a tinker with the voltage testing but not sure what i'm looking for.

Hmm. i thought that as i had swoped the 'on wires' around that this proved it wasn't the programmer as the HW wouldn't of worked.

I've replaced the whole head of the valve with no luck. If i manually move the lever and turn the HW on it will heat up the rads so guess the valve is not stuck. I'll give the electric test a go, anyone know a good guide of what i'm looking for though. Cheers

Hi, My pump got dripped on and blew. i changed it but now the HW comes on fine but nothing happens when i turn on the CH. i changed the 3way valve motor but no luck. I swoped the CH 'on' and HW 'on' wires in the wiring center and it fired up so i guess it's not the programer. Room and Tank...