topic I have a two zone system. The Main Thermostat on the first floor and a secondary on the second floor in Nest Thermostats

I have a two zone system. The Main Thermostat on the first floor and a secondary on the second floor

mjm01833 — Mon, 06 Jun 2022 14:50:41 GMT

I can hear the main furnace kick on and it blows cool air but the outside AC condenser doesn't come on.

Re: I have a two zone system. The Main Thermostat on the first floor and a secondary on the second f

Patrick_Caezza — Mon, 06 Jun 2022 22:05:25 GMT

It looks like your current thermostat is not compatible with any of the Nest thermostats.

You have both an O and B wire and none of the Nests are compatible when both of those wires are present.

Sometimes a B wire is used as a C wire, but this isn't the case this time.

Re: I have a two zone system. The Main Thermostat on the first floor and a secondary on the second f

mjm01833 — Tue, 07 Jun 2022 01:22:08 GMT

Ok Thank You. So even a Nest Smart Thermostat will not work?

Re: I have a two zone system. The Main Thermostat on the first floor and a secondary on the second f

Patrick_Caezza — Tue, 07 Jun 2022 04:28:16 GMT

Nope, I don't know what other brand might work.

Re: I have a two zone system. The Main Thermostat on the first floor and a secondary on the second f

aatienza — Thu, 09 Jun 2022 22:43:29 GMT

Hey mjm01833,

Appreciate the help, Patrick_Caezza. I'm dropping by to ensure if everything is covered here. Hope that sheds some light on the issue.

Thanks,

Archie

Re: I have a two zone system. The Main Thermostat on the first floor and a secondary on the second f

aatienza — Sat, 11 Jun 2022 00:05:59 GMT

Hey mjm01833,

I just wanted to follow up and see if you're still in need of help. Please let us know as we would be happy to answer any questions you may have.

Thanks,

Archie

Re: I have a two zone system. The Main Thermostat on the first floor and a secondary on the second f

EdwardT — Mon, 13 Jun 2022 17:35:04 GMT

Hi mjm01833,

Just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward