Recent content by HPLow

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...

Oh dear, what I really meant is when I turn the temp up to call for heat the black becomes live- I will check where the 2 wires lead to.

Mick I prolly did not make myself clear. On opening up my existing stat and checking with a test pen and turning the heating on, the red wire from the programmer to the stat is LIVE. The black wire becomes live when I turn the temp dial down. I am assuming the black wire goes back to the boiler...

The old stat is just a cheapo and ther are no wiring diagrams. I have opened up the old stat again, turned the heating on and the red is live alright and the black only becomes live when the temp dial is turned down, calling for heat i presume. Can I just use the red and black in this instance...

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...