I am replacing our basement thermostat that had a white and orange wire together and a white and blue wire together. That is all there is. I ham trying to put in a heat only non programmable honeywell thermostat. It shows where to put the blue wire and orange wire but what do I do with the 2 white wires?
You only need one pair of wires to control heat only. It sounds like they used phone wire to run the stat. The phone is so light that they paired the wires together to reduce the voltage drop. Keep them in the pair format.