Replacing Thermostat - no labeled panel on furnace?
I replaced my home thermostat with a wifi system. It works great.
A friend asked me to do the same. He has an old analog thermostat (no digital display) and a 4 wire system.
However, at his furnace the wires are all spliced and appear to run to various places. I could not find one labeled panel like mine had.
My understanding with a 4 wire system is you have to jumper the fan wire. I am not sure how to do this without a panel.
Any advice or help would be great.