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Central Heating

Combi boiler timer wiring

I moved into my flat and the timer for the combo boiler isn't working. I just unscrewed the front to take a look inside and it turns our the timer isn't wired at all. I can't find the installation manual to explain which colour wire needs to go in which terminal, and can't find this information online. I have 4 terminals + 1 brown wire, 1 blue wire and 2 black wires. Can anyone help?! Thanks :)

1 Answer from a MyBuilder Heating Engineer

Best Answer

You don't say what make your boiler is.
You will be able to download the installation manual from the manufacturers website. The instructions on wiring the timer module will be in that.
1 Brown wire-L
2 Blue wire-N
3 Black wire-switch line
4 Black wire-switch line


Answered 24th Nov 2015

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