Hello, we need to work backwards from the furnace or air handler that the wireless relay attaches to.
I need the brand and model number of the furnace or air handler.
Please attach a well focused, close up photo of the wiring diagram glued inside the blower service panel, the picture needs to be taken from straight on, in very good light.
You can use the paper clip- icon at the right end of the tool bar at the top of this dialog box to attach it here.,
Include a picture of the thermostat wire connections to the printed circuit board in the same area.
If you have an error code showing, tell me what the code readout is on the wiring diagram or a sticker next to the diagram please.
If there is no paper clip-icon, look for the '+attach files' link at left of your send button.
I can mark it up with trouble shooting instructions.
We can go from there.