Where can I get my "C" wire common from?
#1
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Where can I get my "C" wire common from?
Hello,
I'm sorry to be asking the same question that has been asked so many times, but it seems everyone has different equipment from me so I'm having trouble figuring this out.
I have oil/baseboard heat, and a Trane Central air unit outside, with a Trane Air handler in the attic.
This is the picture of my current thermostat wiring. I'm installing a Honeywell RTH6500WF (Wifi).
This is a picture of the wiring on my air handler in the attic.
My new thermostat wiring has K,Y2, W2,G, W, C, Y, R, Rc
Can you please let me know which wires to put where?
If I put a multimeter on Rh and W, I get 25.X volts so I was thinking of jumping W to C on the thermostat, but I don't want to hurt anything so I figured I would ask someone with more knowledge on this.
My best,
Ryan
I'm sorry to be asking the same question that has been asked so many times, but it seems everyone has different equipment from me so I'm having trouble figuring this out.
I have oil/baseboard heat, and a Trane Central air unit outside, with a Trane Air handler in the attic.
This is the picture of my current thermostat wiring. I'm installing a Honeywell RTH6500WF (Wifi).
This is a picture of the wiring on my air handler in the attic.
My new thermostat wiring has K,Y2, W2,G, W, C, Y, R, Rc
Can you please let me know which wires to put where?
If I put a multimeter on Rh and W, I get 25.X volts so I was thinking of jumping W to C on the thermostat, but I don't want to hurt anything so I figured I would ask someone with more knowledge on this.
My best,
Ryan
#3
You'll need to be careful here. Does your old thermostat control heat and A/C ?
If not where does the blue wire go and connect to ?
If this thermostat does control heat and A/C then the white on your thermostat is NOT the same white wire that connects to the air handler.
Don't make any changes until we have all the variables ironed out.
If not where does the blue wire go and connect to ?
If this thermostat does control heat and A/C then the white on your thermostat is NOT the same white wire that connects to the air handler.
Don't make any changes until we have all the variables ironed out.
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Thank you both for the quick replies. PJ, I believe you are correct because the white wire is a different gauge at both locations (at least my eye says so)
My current thermostat does control Heat (oil furnace in basement) and AC (Compressor outside, air handler in attic).
My current thermostat does control Heat (oil furnace in basement) and AC (Compressor outside, air handler in attic).
#6
If you find the wire connections like that and you do not have an extra conductor, you can re-purpose the green wire at both ends...
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Thank you the diagram is very helpful.
So if I do find my wiring to be how you showed it in the first diagram, the changes I have to make are:
1. Join G and B at the air handler
2. Bypass air handler with the Y wire from the thermostat to the condenser
Will this make it so the fan is always ON with a/c or always on AUTO?
So if I do find my wiring to be how you showed it in the first diagram, the changes I have to make are:
1. Join G and B at the air handler
2. Bypass air handler with the Y wire from the thermostat to the condenser
Will this make it so the fan is always ON with a/c or always on AUTO?
#8
1. Join G and B at the air handler
The stat end of the green wire moves from G to C.
2. Bypass air handler with the Y wire from the thermostat to the condenser
Will this make it so the fan is always ON with a/c or always on AUTO?
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Thank you Sir!
I was able to get this thermostat working per your instructions. My wires were different colors but with some ohming and many trips from attic to condenser/thermostat/etc I was able to draw my wiring and use that to figure out how and where to move and add wire.
Appreciate your time helping me out!
My best,
Ryan
I was able to get this thermostat working per your instructions. My wires were different colors but with some ohming and many trips from attic to condenser/thermostat/etc I was able to draw my wiring and use that to figure out how and where to move and add wire.
Appreciate your time helping me out!
My best,
Ryan