topic Nest thermostat wiring for AC + gas furnace system in Nest Thermostats

Nest thermostat wiring for AC + gas furnace system

fadikar — Thu, 01 Dec 2022 22:28:52 GMT

We have an AC unit for cold and a gas furnace for heat, hooked up to a Honeywell thermostat. I tried putting these 5 wires in respective slots on Nest thermostat (Y, G, C, W, R), but the nest did not seem to fire up the furnace. It was blowing cold air instead of hot when the mode was set to heat. What would be the correct Nest thermostat wiring for this system? Thanks.

Re: Nest thermostat wiring for AC + gas furnace system

EdwardT — Mon, 05 Dec 2022 22:45:45 GMT

HI fadikar,

Thanks for reaching out. I'm sorry to hear that you're having an issue when you call for heat with your Nest Thermostat. I'd love to know more about this and I have a few questions:

What is the make and model of your HVAC system?
What type of Nest Thermostat do you have?
What is the power reading of your Nest Thermostat? You can find this information by going to Settings > Technical Info > Power.

Thanks,

Edward

Re: Nest thermostat wiring for AC + gas furnace system

EdwardT — Thu, 08 Dec 2022 23:40:48 GMT

Hi fadikar,

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do.

Thanks,

Edward

Re: Nest thermostat wiring for AC + gas furnace system

fadikar — Mon, 12 Dec 2022 20:14:31 GMT

Hi Edward,

I ended up installing a Honeywell smart thermostat and it seemed to work as intended with default wires.

Fadikar

Re: Nest thermostat wiring for AC + gas furnace system

EdwardT — Tue, 13 Dec 2022 00:50:05 GMT

Hi fadikar,

Thanks for the update. We're sad to see you go. We hope we can make it up to you in the future. Let me know if there's anything else.

Thanks,

Edward

Re: Nest thermostat wiring for AC + gas furnace system

EdwardT — Fri, 16 Dec 2022 01:09:27 GMT

Hi fadikar,

Since we have not received any more replies for quite some time, I will be locking this thread in 24 hours. Please feel free to create a new thread should you have some more questions or concerns in the near future and we'll be more than glad to help.

Thanks,

Edward