Right, who knows about wiring for central heating?
I've taken the back box off for the timer switches, and I have:
mains feed in - Red, black and earth
cable to boiler - Brown, Blue and earth
cable to thermostat - Red, Blue,Yellow + Earth
mystery cable - red,black and earth
I have no idea where this mystery cable goes but think it could be part of the problem. It goes into the wall and up.
The neutral of it is bundled into all the other neutrals.
The earth is to all other earths - obviously
The live goes into a bit of chocolate block to connect to the live for the boiler. As the boiler isn't getting power, then whatever is on the other end of this cable might be at fault.
Had plumber round, he says it's electrical so can't touch it.
G
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