Search results

Many thanks. I've got the information I need now to make the replacement.

Thanks for the help. Is it likely that the CH system, or part of it, is getting its earth from the hot water cylinder via the wire to the chassis of the cylinder thermostat that I am about to replace?

Thanks for the reply. I'm not really sure, but I think it's an S plan. There's a motorised valve with water in and water out near the cylinder, and another of the same type near the boiler. So I should forget about the present earth wire and just use the red and blue to connect to com and 1 on...

I am replacing a cylinder thermostat in a central heating system and would appreciate any wiring advice. The old thermostat is a Satchwell. It is very old, settings in Fahrenheit. It has three connections. One wire is yellow and black sleeved and is connected to the metal thermostat housing (so...