Tried to change my home thermostat , old one has an orange wire marked o, no mention of o on new thermostat.?

Question

Tried to just tape it and go without but now I have no ac, when I turn ac on it is heat. Tried to hook up orange wire to Rc slot (which I didnt have ) but that didnt work either??????

Answer 1

You must have a heat pump and have the wrong thermostat.

You need a heat pump thermostat that will have the "O" or orange connection.

The "O" is for the reversing value which switches the valve between heat and cool.

This is why you are getting heat in the cool because you don't have the "O" connection.

Sorry to tell ya.

Answer 2

sounds like you need an expert. sorry can't help