I currently have a basic Honeywell thermostat with only 3 wires - RGW. The red goes to the R with a bridge to the Rc.
There are no other wires in the wire string. Is there anything I can do to get the Wyze to work. Like others I should have checked first before buying.
That makes it easy then. You can take the black wire off of G on the thermostat and the furnace and connect it to the C wire on both sides. (C is Com on the furnace board, there is already a wire there, so there will be 2 wires there afterwards)
Most likely, your furnace will still turn the fan on by itself, if it doesn’t, you can jump W to G.
Make sure you tell the wyze app that your old thermostat has the following wires: C, Rh, and W1