Check out some similar questions!

Lomar558 · May 21, 2008, 02:18 PM

Looking for wiring instructions in replacing older bulb type Weathertron thermostat model
3AAT80A101 with wiring as follow:
G - black
Y - white
X2 - white looped with - W - terminal
B - black
O - white
R - red
Unidentified contact - red

To be replaced with White Rodgers, model 1F89-211, wiring diagram as follow:
C -
L -
W2 already looped with -E -
R -
G -
O/B -
Y -

Thanking you in advance for your kind attention in helping me with this wiring situation.

Lomar558

hvac1000 · May 21, 2008, 03:34 PM

Originally Posted by Lomar558

Looking for wiring instructions in replacing older bulb type Weathertron thermostat model
3AAT80A101 with wiring as follow:
G - black
Y - white
X2 - white looped with - W - terminal
B - black
O - white
R - red
Unidentified contact - red

To be replaced with White Rodgers, model 1F89-211, wiring diagram as follow:
C -
L -
W2 already looped with -E -
R -
G -
O/B -
Y -

Thanking you in advance for your kind attention in helping me with this wiring situation.

Lomar558

The old thermostat is not listed in my books and could be a bad number.

The wiring color combination for the old thermostat is not standard further complicating the issue.

Here is the new stat info.

http://www.white-rodgers.com/wrdhom/.../0037-6233.pdf

As you can see the color normally used for the A/C circuit is usually yellow and yours is white. This is just one of many wiring color problems you have.

Here is another diagram for you with wiring change overs.

http://www.white-rodgers.com/wrdhom/.../0037-6262.pdf

The GE bay/Trane color codes are listed on this one with suggested color terminal changes.

This is all on site work to be safe and I cannot help being so far away.

One thing I would do if there is I would track down every wire and see where it goes. Then I would know for sure which wires to land on which terminal.

If all of this sounds complicated it could be. If you do not feel comfortable it would be best to call a professional so they can make a on site visit to your house and wire the new thermostat for you. Sometimes it is cheaper in the long run to have a pro do the work.One wire mistake could cost you some damage to the new thermostat or the unit.