topic Re: Carrier 8 wire thermostat compatibility with Nest thermostat in Nest Thermostats

Carrier 8 wire thermostat compatibility with Nest thermostat

CayteD — Mon, 19 Feb 2024 23:48:40 GMT

I have a Carrier 8 wire thermostat I'm trying to wire to a Nest Thermostat which has 6 pins. The compatability guide said it was compatible even though the wire count is differnt. I've read several posts saying don't connect the brown and black wires. Can you advise?

Thanks Cayte

Re: Carrier 8 wire thermostat compatibility with Nest thermostat

Jenelyn_O — Fri, 23 Feb 2024 08:06:45 GMT

Hi CayteD,

Thanks for reaching out in the Google Nest Community forum. I'd like to take a closer look at it. To confirm, in what country are you located? Could you please take a photo of the wires connected to your thermostat and to your system's control board? Ensure that the labels of the wire are visible.

Best,

Jenelyn

Re: Carrier 8 wire thermostat compatibility with Nest thermostat

CayteD — Fri, 23 Feb 2024 15:44:30 GMT

We are located n the USA. This controls a heat pump and furnace. Thanks for taking a look!

Re: Carrier 8 wire thermostat compatibility with Nest thermostat

zoeuvre — Fri, 23 Feb 2024 22:49:08 GMT

Hi there,

Thanks for the photo. Fortunately, your thermostat wires are compatible with our Nest Learning Thermostat 3rd generation and should be wired to the Nest Learning Thermostat base as shown:

The Nest Thermostat does not need S1 and S2 wires. Wires labeled S or S1 can be indicator lights or sensor wires. The Nest Thermostat uses its LCD display instead of an indicator light and gets sensor information, like outdoor weather conditions, over Wi-Fi. Also, here's a guide for the installation and setup of a Nest Learning Thermostat.

Let us know if that helps.

Regards,

Zoe

Re: Carrier 8 wire thermostat compatibility with Nest thermostat

CayteD — Sat, 24 Feb 2024 03:51:58 GMT

It's installed and working great. Thanks!

Re: Carrier 8 wire thermostat compatibility with Nest thermostat

zoeuvre — Sat, 24 Feb 2024 14:31:39 GMT

Hello CayteD,

Awesome! I'm glad that everything has been sorted out. If you have questions or concerns in the future, feel free to start a new thread, and we'll be happy to help.

Cheers,

Zoe