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Thanks for reply. My comment was just regarding old wiring colours but I did notice today, whilst wallpapering around it, that there is a tiny piece of red insulating tape on the black wire so I think that probably means switched live.

Thanks for you help and advice Harry, much appreciated. I think I will look into wireless option and have a word with the boilerman when we have our annual service in a couple of weeks.

So worried in fact I forgot the link !!!! https://www.diynot.com/diy/threads/wiring-advice.106754/#post-718550

Yes I know what you are saying. I saw a couple of pics and comments when trying to find an answer before I posted. Would take a photo but having issues with the phonecam. Definitely as I described. Nothing wired into #2 and earth is actually wired into the metal wall box not #earth as in your...

Definitely only the 3 wires as decribed.

Thanks again. I will get a new one to make sure all is ok. As you say wiring is simple, red to #1, black to #3 and earth to wall casing.

Thanks for reply Harry. The heating is turned off for summer, ie. the 24hr central heating timer pegs on the boiler are all off but it works fine when they are set to switch on and off. I had assumed, probably wrongly that having the timer on the boiler negated the wall thermostat. There is...

This might seem silly question but am ignorant of such techy matters. I have a wall mounted Honeywell T40 Thermostat on the stairs wall and I want to know if it is still connected to central heating and can it be removed when next decorating. It has not been touched (adjusted) for well over 10...