NOMA programmable thermostat

I have tried to replace a conventional lever action mercury thermostat with a new digital programmable Noma thermostat. The AC works fine but when I turn on the heat, the AC come on then too and not the heat. I have no heat. This was the wiring for the original thermostat: Orange -> Y Red ->...

I have just purchased a Noma 5 + 2 Programmable Thermostat model 52-2557-0 from Candian Tire. There are 4 terminals on the back G are why W I have an old Mercury Lever Thermostat with only 2 wires; one white and one labelled "C". In the manual it states not to use the wire labelled "C". That...

I have tried to replace a conventional lever action mercury thermostat with a new digital programmable Noma thermostat. The problem is when it turns on the heat and fan works fine but when it reaches heating it shuts of but the fan stays on and will not shut off:confused:

Hi everyone, I just purchased the above mentioned thermostat and connected the wires accordingly. My question is the old mercury thermostat had a jumper to are and RN if I'm not mistaken. The new digital thermostat only asks that the four wires be connected with no mention of a jumper. I...

I am changing a York thermostat to a Noma programmable. I have rewired transferring w to w, rc to rc, g to g, why to why . There is a wire jumper on the York that goes from rc to 4. There is no corresponding 4 on the Noma. Does anyone have a suggestion as to where the wire jumper should go if I...