Blue Wires on Furnace Question and how wired to Thermostat?
Had to pull my furnace today to take care of a mouse problem and install a screen in the duct outlet to prevent critters from nesting in my ductwork.
Anyway, I decided to extend the wiring to the furnace (12 volt red and 12 v ground) and 2 blue wires with quick disconnects so I can pull the furnace quickly and easily next time I need to do some work on it.
Anyway, I'm not sure which blue wires goes where? I know that the blues are for thermostat control but does it matter which one is attached to the thermostat leads in the furnace bay?
Can I damage something if I install the wrong blue wire to the 2 wires headed back to to thermostat? I see one post on the Duetherm thermostat that says furnace, where does the other blue wire go?
Please help. I don't want to screw anything up. I spent 8 hours cleaning the ducts out today. You won't believe how much mouse crap, nest material, acorns, I was able to remove today.
I used a mixture of Odoban and bleach to clean the ducts and also used the same mixture to wipe down the exterior of the heat exchanger that warms the forced air.