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New Member
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Jul 21, 2007, 03:00 PM
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Upgrade from a Weathertron to a Honeywell RTH230B Thermostat
[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:
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Ultra Member
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Jul 21, 2007, 03:24 PM
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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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New Member
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Jul 21, 2007, 03:55 PM
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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?
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!
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Ultra Member
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Jul 21, 2007, 04:14 PM
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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.
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New Member
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Feb 2, 2009, 05:09 PM
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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:
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.
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Heating & Air Conditioning Expert
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Feb 2, 2009, 06:14 PM
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You have the wrong thermostat
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