Linked Questions
68 questions linked to/from How can I add a "C" wire to my thermostat?
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Where do I connect a C wire in a Rheem Furnace REAB 1415J? [duplicate]
I'm upgrading the thermostat with a Honeywell wifi one. I found all cables at the thermostat end, but can't figure out where to connect the C wire to the furnace (Rheem REAB 1415J).
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Is it possible to use add-a-wire with my current configuration to add a C-Wire? [duplicate]
I only have four wires: Red, Blue, Yellow, and Green. My old thermostat jumps the R to RC and leaves C empty.
I have a new thermostat that wants 5 wires, but I don't have C. I am not sure what the ...
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Where is my Common Wire? [duplicate]
I purchased a wifi thermostat and cannot located the common wire. My unit is old and is a Coleman 70 with no terminals inside labeling the wires.
As you can see in the second image, there is a blue ...
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Options for adding “C” wire to thermostat [duplicate]
Possible Duplicate:
Options for adding “C” wire to thermostat
I am upgrading to a newer thermostat that requires a constant 24 volt feed, I have an extra (unsused) wire in the cable ...
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How can I get my thermostat C wire connected? [duplicate]
I have an older furnace, on the switch block I have Y,C.W,R and an unlabeled screw that connects to the shut off it looks like. I need to hook up a thermostat that needs the C wire. I have a spare ...
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Need to know where to connect my C wire [duplicate]
I had the extra wire in the wires run from my thermostat to my A/C, but the old thermostat did not need the C wire, so it was cut and stuff on both ends. While installing the new thermostat I ...
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thermostat c wire question [duplicate]
I am looking to install a new thermostat that will require a C wire. I have a single stage A/C unit and my current thermostat has Rc, G, and Y wires. There is also an unused blue wire which I traced ...
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How can I implement an unused wire as a C wire for my thermostat? [duplicate]
I have a boiler system that uses 2 wires to the thermostat. I am going to buy a new thermostat that needs a C wire. There is a spare wire not being used and it is not hooked up to anything.
How can I ...
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HVAV no C terminal but available wires [duplicate]
Pretty common problem here but the posts I've seen are a little different. New Wi-Fi tstat, no C terminal at furnace but plenty of available wiring at both ends. Unlike others problems posted of ...
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Where to connect the C Wire? See pictures and diagram [duplicate]
I have Rheem RBHC-14A00NFA AC unit. I am trying to install nest thermostat but don’t know where to connect the C wire. I am attaching the picture of the wires and the diagram. Please help! Thanks
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How to identify the C terminal on my HVAC [duplicate]
As you can see I have a Y G W R/2 C/3 D/1 terminals on my HVAC. I am planning to change my thermostat to one that requires a c line. There are 2 spare lines available, however I am not sure which is ...
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Adding a "C" wire for a wireless theromstat [duplicate]
I have a heat only system with two wires leading to the thermostat - red and white - and am wanting to add a wireless thermostat. The new thermostat however requires a "C" wire. Can I add a C wire?
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How do I create a C wire? [duplicate]
My furnace is old and only has 4 wire connections, but I require a C wire. How can I create one based on this diagram?
I do have 5 wires running between the furnace and thermostat.
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How can I add a common "C" wire to my thermostat? [duplicate]
Possible Duplicate:
Options for adding “C” wire to thermostat
I recently bought the Honeywell THM5320R Wireless thermostat. After going to hook it up I found what many others have, it requires a ...
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What powers a Nest thermostat? [duplicate]
I have an older thermostat I'd like to replace with the more modern Nest thermostat. The online Nest compatibility checker tells me that I have a compatible device. However, I'm not sure how it could ...
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