Recent content by Grandad63

Yes positive about colours there is also a standard earth wire green & yellow attached tp the back of the unit Were the three colours the old standard? Red Live Black Neutral Blue Earth as it is possible that this thermostat has been in the same place as the house was built approx. 1976...

There are currently three wires attached to my honeywell Black to 1 Red to 3 Blue to 4 could somebody please tell me to which terminals I should attach them to on the Honeywell DT90E which has A B & C. Thanking you in anticipation