Yes, another "C" wire question!
#1
03-09-17, 06:22 PM
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Yes, another "C" wire question!
Hello, I'm sure you guys are sick of seeing questions about "C" wires but I need some help.
I have a 1993 Goodman Furnace and also central air. model number GMPN060-3 REV B. I'm replacing a generic crappy thermostat with a Honeywell Lyric T5. I have four wires coming into my thermostat, plus a fifth blue wire that is UNUSED.
I can obviously use that blue wire for the "C" wire but I'm not sure where to connect it on the furnace board. Here are some pictures of the wiring/board etc.
Thanks for any help! - photos are attached!
I have a 1993 Goodman Furnace and also central air. model number GMPN060-3 REV B. I'm replacing a generic crappy thermostat with a Honeywell Lyric T5. I have four wires coming into my thermostat, plus a fifth blue wire that is UNUSED.
I can obviously use that blue wire for the "C" wire but I'm not sure where to connect it on the furnace board. Here are some pictures of the wiring/board etc.
Thanks for any help! - photos are attached!
#2
03-09-17, 06:41 PM
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You're supposed to give us harder things to answer. 
That white wire that is connected to that blue wire is sending C out to the condensor.
While the yellow wire is sending 24vac out on the red wire when the compressor is running.
That white wire that is connected to that blue wire is sending C out to the condensor.
While the yellow wire is sending 24vac out on the red wire when the compressor is running.
#3
03-09-17, 07:03 PM
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Thanks for the help! I'm rather dumb when it comes to HVAC. So which wire do I have to tap into?
#4
03-09-17, 07:10 PM
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How about the one in the blue circle marked C.
Take the wire nut off and add your blue wire to that connection.
Take the wire nut off and add your blue wire to that connection.
#5
03-09-17, 07:11 PM
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Sorry, I figured that. Just wanted to make sure.
That wire will provide constant 24V correct? Not just only when th condensor is on?
That wire will provide constant 24V correct? Not just only when th condensor is on?
#6
03-09-17, 08:31 PM
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#7
03-09-17, 08:41 PM
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Oh, so I need to connect my blue wire into that circled wire nut and ALSO into that red/yellow connection?
#8
03-09-17, 08:45 PM
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No....sorry. Didn't mean to confuse you. The R (red) wire is already at the thermostat. It is like the + half of the circuit. The C (blue) wire is like the - half of the circuit.
You just need to add the C connection and you're all set.
You just need to add the C connection and you're all set.
