my current wiring is gywr and the new one is gywrc how do i wire new one

G= green wire, (fan) : Y=yellow wire, (cooling) : W=white wire, (heat) : R=red wire, (24 volts) The C is for 24 volt common wire. You will not need to use the C terminal unless the new thermostat requires 24 volts to operate. Hook up the GYWR and you should be ok. Let me know if that dosen't work and I will advise you how to hook up the common wire.
Reply to
stanhvac1
Hi thank you for the help I do need help with the common wire I can not finish the set up without it I read on how to jump certain wires however at the furnace I don't have gywr I have 1-5 and not just how to jump wires
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disqus_rLo8iUYkWU
You haven't given any information on the furnace, however, your thermostat control wires should be, Red, Green, White and yellow. Are they hooked to terminals 1,2,3 and 4 on the furnace. If so 5 should be common. You will need to see if there is an extra wire in the thermostat cable. If so you can hook it to C on the thermostat and 5 on the terminal strip on the furnance.To be sure, you can check, (if you have a volt meter) for 25 volts ac between 1 and 5. If you don't have a volt meter you will need to look at the transformer for the 2 wires that comes to the terminal strip to see where the 24 volts connections are. I will keep a close watch on here so I can answer you quicker. Let me know what you find. One thing I forgot, be careful in jumping out control wire. If you happen to jump from R,G,Y,or W to C you will short out the transformer and probably the thermostat also.
Reply to
stanhvac1

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