[F]I have an old weathertron thermostat (about 25 yrs old). We have central air and heating in our town home and I just purchased a Honeywell RTH230B programmable thermostat to replace it.

I am unaware as to how to connect the new honeywell to my system because it has 5 slots for wires, but my old unit utilized 6 wires.

I've got:
O=Orange wire
G=Brown wire
Y=Yellow wire
X2
B=Blue wire
U
W
F
R=Red wire
T=Black wire

But only the: O, G, Y, B, R, and T are being used.

The thermostat has an aux and emergency heat function, which I don't think we've ever used the emergency heat living in Southern California.

I'm pretty bewildered, I just thought matching up the colors would suffice but I don't think it's that simple anymore...
:confused:

What are the terminals on the new thermostat? It looks like the heat wasn't hooked up on the old thermostat, this is a heat pump, correct?

Quote:

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Originally Posted by hvacservicetech_07

What are the terminals on the new thermostat? It looks like the heat wasn't hooked up on the old thermostat, this is a heat pump, correct?

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I'm going to have to get back to you on this. I just discovered that my old thermostat was a multistage unit and my new honeywell is only a single stage. I'm going to exchange it for the multistage Honeywell Vision Conventional 5-1-1-Day Programmable Thermostat (RTH7400D).

I hope I can figure it out then. If not, I will definitely ask another question and provide more detailed info.

Thanks!

The "t' terminel will not be used ,tape it off , the red will go to "R", the "B" is a "C" or common on the new stat, Brown wll go to "G" on new stat , orange to "O" and Yellow to "Y" It does not look like you had it wired for two stage thermostat. The x-2 was for emergency heat and the "T" was for a thermister on the outside unit. The "W" could have been hooked up for second stage heat, if you had it.
This is an old GE or Trane thermostat.

Quote:

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Originally Posted by rocksteady

[F]I have an old weathertron thermostat (about 25 yrs old). We have central air and heating in our town home and I just purchased a Honeywell RTH230B programmable thermostat to replace it.

I am unaware as to how to connect the new honeywell to my system b/c it has 5 slots for wires, but my old unit utilized 6 wires.

I've got:
O=Orange wire
G=Brown wire
Y=Yellow wire
X2
B=Blue wire
U
W
F
R=Red wire
T=Black wire

But only the: O, G, Y, B, R, and T are being used.

The thermostat has an aux and emergency heat function, which I don't think we've ever used the emergency heat living in Southern California.

I'm pretty bewildered, I just thought matching up the colors would suffice but I don't think it's that simple anymore...
:confused:

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I have an old weathertron thermostat. I jut purchased a honeywell RTH230B programmable thermostat to replace it. Honeywell have 5 wires RH, RC, W, Y, G. But my old unit utilized 8 wires; G green, Y yellow, X2 black, B blue, U_W white, O orange, R red, T brown.

You have the wrong thermostat