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thanks for this lot guys. the boiler is working and heating hot water, so there is power to it. the programmer is also working. just the pump which appears not to be getting any power. i will start at the fuses and work my way up. thanks for all the advise so far

i should have said its not the pump. i replaced it yesterday before checking the supply - dumb eh! - i'm pretty sure it is a motorised valve, so will consider this potentially faulty. what about the room stat? should i by pass this? also, what about the PCB, or a component attached to it? could...

my daughters potterton ultima? 30 boiler starts and heats hot water but the pump does not start so no central heating. it has a three way valve in the system. There is no power either at the pump or at the pump live terminal on the boiler. the CH neon on the three way valve lights up if the...