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I don't know much about electrics and generally avoid, so sorry if this is a bad description. The junction box (white box on the wall with all the trip switches) keeps tripping. As in, not individual switches but all electrics with the master switch cutting the power to everything. When...

many thanks sorted and works perfectly.

Help Please. I have removed the cover of my old mechanical thermostat, which is a Potterton PRT 100. There are 3 wires connected to it, which go into 3 pins as follows Red Wire - Pin 1 Yellow - 2 Blue - 3 According to the diagram on the cover these are 1 = TL 2= H 3 = N...

Correction - it isn't earth, its just a yellow wire

Finally arrived, taken the cover from the old thermostat off. There are 3 wires connected to it: blue, red, earth. They go into a terminal as follows Red - 1 Earth - 2 Blue - 3 problem the CM907 has terminals marked A,B,C. What goes where ? I took a picture if it helps

Thanks, I was thinking of getting a digital one but a bit confused about the types and compatibility etc. Seems like some of them basically replace the programmer as well. I'll take the thermostat off the wall and have a look before I do anything else

I haven't taken it off the wall yet. Was planning to do the job at weekend The answer to the second question isn't straightforward: I had to replace the programmer a few years ago and bought an identical one but when I fitted it there was a plastic widget which obviously locks the two...

My old CH thermostat seems to have had it's day with at least a 5C difference between the set temp and the actual temp. I'm thinking of replacing it with a new one and have a couple of questions. What is the best one to get? I'm thinking of fitting it myself so this is both for how well it...