Working on getting a RTH9580WF installed on my Trane AC/Furnace.
There is a terminal labeled C inside the unit and I have a 8 wire thermostat wire.
So I wired the brown wire to the C terminal and proceeded to hook up the new thermostat and got nothing (no power at stat). Broke out the volt meter and with the furnace door switch activated I tested the C terminal in the furnace and got 0 volts. Went down the line and found 26v at the R terminal. Moved my brown wire down to R, tested voltage at the thermostat brown wire and get 26v at all times. Reconnected the new Honeywell and still nothing. I am suspecting a bad unit, but wanted to see what you guys think before I take this one back. I did take my existing plane jane non programmable Honeywell and connected my 26v brown wire to the C terminal in the stat and did not get power there either (it can take batteries) which has me questioning if its a wiring issue or stat issue.
I expected the C terminal in the furnace to be 24v, but I'm not getting it with my volt meter. The R terminal currently has only a water sensor connected to it. Here are the pictures. This picture was taken before I moved the brown wire from C to R.
Edit to add there is a humidifier w/ its own 24v transformer attached to this unit so you will see a few extra tstat wires.
Trane C Wire
There is a terminal labeled C inside the unit and I have a 8 wire thermostat wire.
So I wired the brown wire to the C terminal and proceeded to hook up the new thermostat and got nothing (no power at stat). Broke out the volt meter and with the furnace door switch activated I tested the C terminal in the furnace and got 0 volts. Went down the line and found 26v at the R terminal. Moved my brown wire down to R, tested voltage at the thermostat brown wire and get 26v at all times. Reconnected the new Honeywell and still nothing. I am suspecting a bad unit, but wanted to see what you guys think before I take this one back. I did take my existing plane jane non programmable Honeywell and connected my 26v brown wire to the C terminal in the stat and did not get power there either (it can take batteries) which has me questioning if its a wiring issue or stat issue.
I expected the C terminal in the furnace to be 24v, but I'm not getting it with my volt meter. The R terminal currently has only a water sensor connected to it. Here are the pictures. This picture was taken before I moved the brown wire from C to R.
Edit to add there is a humidifier w/ its own 24v transformer attached to this unit so you will see a few extra tstat wires.
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