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How can I add a common wire to the existing furnace wiring?
My current furnace has Rh and W1 to the thermostat. I'd like to add a C for my new networked thermostat, but I'm not sure where to connect it.
From my research it sounds like I should be able to just ...
2
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1answer
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Potterton EP3000 -> Horstmann C27 boiler programmer wiring
I'm in the UK, using an ancient tempermental Potterton EP3000 boiler programmer, but I have a brand new Horstmann C27 which I'd like to replace it with.
Apart from the mains supply, there are three ...
