topic Re: Trane wiring issue in Nest Thermostats

Trane wiring issue

RustyF — Sat, 08 Apr 2023 14:55:29 GMT

How do I wire Trane gas pack ( or heat pump) based on my wiring picture? When I wire based on like for like characters Nest says I have a dual heat system which I don’t. Thanks.

Re: Trane wiring issue

RustyF — Sat, 08 Apr 2023 15:00:01 GMT

Currently wired which isn’t working.

Re: Trane wiring issue

RustyF — Sat, 08 Apr 2023 18:03:23 GMT

Resolved the wiring issue - moved blue wire to C. AC works and the heat run in testing mode. Now the heat will not run - 2 stage heat when I adjust temperature. It was detected and configured. Tried the pro setup and selected activate fan settings - issues is sporadic. I also updated the firmware. Ready to return.

Re: Trane wiring issue

sporfrog — Sat, 08 Apr 2023 23:05:13 GMT

Something to consider... On the old thermostat you will see it has two sets of wiring letters. The inner letters are used if the thermostat is controlling a traditional furnace and AC unit. The outer letters are for a heat pump. So it is possible the correct working is brown to O/B, black to W1 and Blue to C. You would probably need to reset the wiring on the thermostat.

Re: Trane wiring issue

RustyF — Sat, 08 Apr 2023 23:18:42 GMT

Thanks for your advice. I found another posting to move blue to C. We have a two stage gas pack. If I test the heat it works but doesn’t heat in normal mode. I have tried the pro setup - select activate fan. Not sure what to do now. I reinstalled my old thermostat = that works.

Re: Trane wiring issue

zoeuvre — Wed, 12 Apr 2023 14:04:05 GMT

Hi there,

Thanks for lending a hand here, @sporfrog.

@RustyF, I wanted to ensure you were good to go. Please let us know if you are still having any questions from here, as we would be happy to take a closer look and assist you further.

Best,

Zoe

Re: Trane wiring issue

Jenelyn_O — Mon, 17 Apr 2023 17:08:05 GMT

Hi folks,

Chiming in — do you see any messages or code on your Nest Thermostat screen? Could you please go to your thermostat Settings and look for Equipment and check for a wiring diagram?

I appreciate your help, @sporfrog and Zoe.

Thanks,

Jenelyn

Re: Trane wiring issue

Jenelyn_O — Tue, 18 Apr 2023 17:13:02 GMT

Hi RustyF,

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you need assistance or want to discuss topics, feel free to start a new thread.

Regards,

Jenelyn