I am looking to replace the mercury thermostat with a Lux Kono thermostat simply to have the ability to run the fan only and circulate the air. I believe this thermostat does that periodically. I'm in the San Francisco bay area and the call for heat is shorter than the need to circulate the air.
The furnace has a panel contact switch so it doesn't run if the panel is off. It has a Johnson Control G779 Universal Intermittent Pilot Control unit. The wiring diagrams are intelligible but it's not connecting for me because I can't trace the physical wires for the thermostat. I can't seem to understand where the thermostat wires are going and the disconnect switch transformer has two red wires bunched up into the wall. I want to run a new 18/8 thermostat wire from the furnace. I've been looking at replacing the furnace and water heater but can't afford it for a couple years.
I'd greatly appreciate any assistance.
