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In the end I took the time to properly wire it in using a second cable to power the receiver. Thank you all for the help!

It only says NO because I used Gimp while I was thinking how I should wire it, and when I decided it is probably the NO I wrote it there. Normally the NO is not there, and I forgot to hide the layers with my assumptions on them when I created the image I uploaded. That is the only assumption...

I meant the marking on the Potterton label. The (NO) under the 'H'. That is only just my assumption, as I could not find the manual for the Potterton. I found that it may be the 'termostat switched live', but could not find official doc. I think it is the normally open, since if it is the...

The (NO) mark under the Potterton 3 (H) is my assumption, I mistakenly left it in the picture. Was my assumption correct or does this change the situation? Thank you for your help, I will mark the answer when I replace the thermostat.

Hi, I am planning to replace my old Potterton PRT2 thermostat with a Computherm Q7RF (RX) receiver. The potterton has 4 connection points: 2 - COM - Brown wire (jumped from 4) 3 - H - Yellow/Green wire 4 - TL - Brown wire 5 - N - Blue wire The computherm also has 4: N L 1 - NO 2 - COM I...