Wire Question
#1
06-05-23, 04:06 PM
Wire Question
My thermostat has no C wire. My air handler and compressor outside need the C connection. I have extra wires in my thermostat line. Is there a way to connect one to the thermostat and make it work? Or should I just look for another thermostat? This is just a cool only set up.
thank you,
Joe
thank you,
Joe
#2
06-05-23, 04:37 PM
Group Moderator
Post some pictures of the wiring at the air handler....... How to insert pictures.
If you want to try and find C yourself..... locate the thermostat cable at the air handler. It will be much larger than the condenser cable. The Y- yellow wire in the T'stat cable should go to one of the condenser wires. The other condenser wire will be connected to C.
If you want to try and find C yourself..... locate the thermostat cable at the air handler. It will be much larger than the condenser cable. The Y- yellow wire in the T'stat cable should go to one of the condenser wires. The other condenser wire will be connected to C.
#4
06-05-23, 05:52 PM
Yes, I do see the C in the air handler and the C wire in the Condenser, however theres nothing in the thermostat. The diagram shows thet i need to connect the C in the thermostat (which theres no terminal for) to the C in the air handler, then on to the C in the condenser. Seems to me I'd have no control from the thermostat to turn on the condenser. I talked to a rep for white rogers and he said I didn't need a C because the thermostat uses batteries.
Who knows,lol, I'm stumped
I'll ger some pic up on here.
Who knows,lol, I'm stumped
I'll ger some pic up on here.
#5
06-05-23, 06:25 PM
Group Moderator
The only reason you need a C wire to the thermostat is if it needs to be powered with 24 volts. If it has or can run on batteries then you do not need to connect the C wire to the thermostat.
Note: It is often required to connect a C wire to a NEST thermostat or other smart thermostat.
Note: It is often required to connect a C wire to a NEST thermostat or other smart thermostat.
#6
06-05-23, 07:26 PM
Group Moderator
Most battery powered thermostats don't require a C connection.
The C connection is to operate the display on some stats as well as the wifi section if a smart stat.
The C connection is to operate the display on some stats as well as the wifi section if a smart stat.
#7
06-06-23, 01:58 AM
Yeah, I got that, so...my C terminal on the air handler should connect to the condenser outside and i should be good.
thermostat nc air handler ---------C----------condenser
thermostat nc air handler ---------C----------condenser
