topic Re: Nest Thermostat wiring issue with K connection on original thermostat. in Nest Thermostats

Nest Thermostat wiring issue with K connection on original thermostat.

Backgarden97 — Mon, 29 May 2023 17:59:19 GMT

I have a new Nest Thermostat that is suppose to be compatible with my system according to the website compatibility check, however, the Google Home walk through says it isn't, because there is a K connection.

Original thermostat was a programmable Honeywell TH8320UP1037. There is a wire going to K. The system is a basic conventional HVAC.

Advice please?

Re: Nest Thermostat wiring issue with K connection on original thermostat.

Jenelyn_O — Sun, 04 Jun 2023 23:29:45 GMT

Hi Backgarden97,

Thanks for posting in the Google Nest Community forum. I'm sorry for the delay. I'd love to know more about it. Could you please take a photo of the wires that are currently connected to your Nest Thermostat and to your HVAC control board?

Best,

Jenelyn

Re: Nest Thermostat wiring issue with K connection on original thermostat.

Backgarden97 — Mon, 05 Jun 2023 16:08:29 GMT

Hi Jenelyn, thanks for responding. I have pictures of the thermostat and the "interface" between the thermostat and the HVAC . Note that the K connection must be combining two lines from the HVAC.

Re: Nest Thermostat wiring issue with K connection on original thermostat.

Jenelyn_O — Thu, 08 Jun 2023 18:32:13 GMT

Hey Backgarden97,

Thanks for sharing the photo of your thermostat wiring. Nest Thermostats doesn't have a K terminal that's the reason why it turns out not compatible. I would suggest contacting a pro installer, as some of the proprietary systems can be rewired to be compatible. For additional reference, you can visit this link.

Best,

Jenelyn

Re: Nest Thermostat wiring issue with K connection on original thermostat.

Backgarden97 — Fri, 09 Jun 2023 18:48:40 GMT

OK, thanks anyway.

Re: Nest Thermostat wiring issue with K connection on original thermostat.

zoeuvre — Fri, 09 Jun 2023 21:46:13 GMT

Hi folks,

As we got our resolution here, I'm going to mark this thread as complete. I'll be locking this thread if we won't hear back from you again in 24 hours. Should that happen, feel free to create a new one if you have more questions or have other concerns in the future.

Thanks for your help, Jenelyn.

All the best,

Zoe