topic Nest thermostat with only one R wire but my old thermostat have a R and RC wire connected in Nest Thermostats

Nest thermostat with only one R wire but my old thermostat have a R and RC wire connected

Synergy — Fri, 14 Jan 2022 05:39:02 GMT

I have separate heating and air conditioning systems, with separate R and Rc wires that come out of the wall and are connected to my system but my nest thermostat has only one 1 R wire. How do I connect it correctly?

thanks

Re: Nest thermostat with only one R wire but my old thermostat have a R and RC wire connected

MelbaDT — Wed, 19 Jan 2022 06:12:36 GMT

Hey Synergy,

Thanks for posting and sorry for the delayed response.

Do you happen to have a dual transformer system which uses separate power sources for heating and cooling? If yes, it's strongly recommended that you contact a local pro to prevent damage to your system. You may also check on this link for more information.

Best,

Melba

Re: Nest thermostat with only one R wire but my old thermostat have a R and RC wire connected

MelbaDT — Fri, 21 Jan 2022 06:32:30 GMT

Hey there,

Just checking back in — let me know if you still need help with your Nest thermostat.

Best,

Melba

Re: Nest thermostat with only one R wire but my old thermostat have a R and RC wire connected

MelbaDT — Sat, 22 Jan 2022 07:03:45 GMT

Hi,

Since it's been since this thread was last updated, we'll be locking it if we won't hear back from you again within a day. Should that happen, feel free to create a new one should you have more questions or have other concerns in the future.

Best,

Melba