I have a Trane XV90 and XL 14i. The wiring looks a little strange as in the picture bellow.
_____________ | | BK W2 W1 R G Y B/C YLO O |___|| |__| || | | | || |_____>|----------| | | ||_________>|other wire| | | | ------------ V V V --------------- |thermostat | ---------------
The R and G are jumpered together and the G wire is connected on the board but is actually not connecting to the thermostat on the other end. So people told me that means the furnace fan is always on! (In my diagram above, I switched the location of Y and B/C to make diagram easier to draw. You can refer to the photo added below to see the details)
My questions are the following
- is the jumper between O and Y doing anything? I don't think I have heat pump
- I need to install Honeywell wifi thermostat and I am thinking of doing either one of the following:
remove jumper between R and G, and use G to connect B/C and then to thermostat C and put jumper between G and Y
leave jumper between R and G, and use G to connect B/C and then to thermostat C and put jumper between G and Y
remove jumper between R and G, connect G on control board to thermostat G, and finally have the spare wire to connect B/C and then thermostat C
leave jumper between R and G, does not connect G to thermostat, and just use a spare wire to connect B/C on board to thermostat C
Can anyone comment on those plans? Thanks a lot!