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i have a 15 yr old Potterton Suprima that has worked well over the years without any probs. This morning I heard the boiler making some noises and the rads not warming up, which I have never experienced before. When I checked the system I noticed the fuse to the power supply to programmer had...

I bought a Digistat+ room thermostat to replace my current stat which I believe has stuck as the heating would not go off at preset temperatures and need help/advice from you pros on how to wire up the new Digistat+. My current stat has 3 wires red, black and green. Using a test pen I turned...