Wyze Thermostat - 3 Wires only

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.

Thanks

Can you share photos of the furnace and thermostat wiring please?


Thermostat


Furnace

Do you ever run the fan separately from the furnace?

No

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

still no power to the wyze

Connect the red wire to Rc on the thermostat, wyze will make the connection to Rh internally by iteslf.

You are the man .
Beers on me my friend.

I’m hoping someone can guide me with this as well. Have 3 wires total at thermostat. Only 2 connected to heat only furnace, forced hot water, so no fan. Seems like I should be able to make this work with the spare third wire but I don’t know how.

what model zone board is that, and what are the labels on this connector?

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