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New Member
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Feb 8, 2009, 09:18 AM
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Replacing a Trane Weathertron tstat w/Honewell RTH3100C
I have a Trane Heatpump and the old "weathertron" thermostat had wires:
Y
G
O
x2
B
W
R
T
Directions for the new 3100 addresses everything except the "T"
Does anyone know where the "T" wire for the Trane goes on the HW?
thank you,
(Doingitmyself) dimonthecoast
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Heating & Air Conditioning Expert
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Feb 8, 2009, 09:24 AM
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You will not use the T just tape it off. That trane is a old Bay ge thermostat.
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New Member
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Feb 8, 2009, 10:12 AM
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God bless you darlin' - I'll be back if it doesn't work - I'm just glad the weather is warm this weekend!
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New Member
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Feb 8, 2009, 12:12 PM
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Okay - followed the HW directions - it stated that if the old tstat had both "O" and "B" wires (which mine does) to attach the "B" wire to the "C" terminal, which I did.
It's not working.. .
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Heating & Air Conditioning Expert
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Feb 8, 2009, 02:11 PM
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Did you follow the wire layout as on page 12 of the Honeywell manual Exactly? Have you checked to make sure all power is on the inside/outside unit? Have you checked to make sure you have 24 volts at the thermostat?
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New Member
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Feb 8, 2009, 07:33 PM
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I did everything on the HW manual exactly (including using those little white labels), all the power was restored, don't have a volt meter - amateur! Guess I'll have to call the heat and ac guy! I didn't need that $100 bucks after all.
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Heating & Air Conditioning Expert
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Feb 8, 2009, 09:07 PM
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Many times it ends up that way. Without being there my hands are tied to the manual and any old tricks I remember. Here is a older cross over diagram that shows Trane and the GE bay stat. You might look this over to see if any help.
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New Member
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Feb 9, 2009, 07:14 AM
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I found that diagram on an earlier thread - it matches what I've done.
I did notice on the old weathertron a saudered link to a "u" from the "w" wire. It wasn't rigged after the fact, but actually part of the manufactured board.
The heat/ac fella comes tomorrow morning - cold weather comes through Wednesday!
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New Member
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Feb 9, 2009, 07:14 AM
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Thanks for everything
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New Member
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Feb 10, 2009, 08:34 AM
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HVAC1000 - Heat/ac contractor just left - the problem? Seems the builder "wedgeded" my main wire in the wall between the stud and the supporting 2x4 at JUST the place I screwed the new face plate in. The screw penetrated the insulation on the wire and shorted it. $113.96 later and it's fixed.
You may want to put that in your "what's wrong when I've done everything right" file.
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Heating & Air Conditioning Expert
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Feb 10, 2009, 09:15 AM
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The screw in the wire things I just cannot see from here. I am glad at least the wiring was on the thermostat correctly. I will add the screw in the wire thing to my possible solutions.
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