topic Re: How to wire new Nest Thermostat in Nest Thermostats

How to wire new Nest Thermostat

jono428 — Fri, 04 Aug 2023 20:58:29 GMT

I reached out to customer chat this morning and was told my system is compatible and an email with wiring instructions would be sent but I never received it. Can anyone help. I have a Carrier Model 58CTW/CTY Furnace and Model 24ACB3/24CC6 AC. Thank you.

Re: How to wire new Nest Thermostat

CoolingWizard — Sat, 05 Aug 2023 03:08:32 GMT

@jono428 ,

That looks like an Ecobee thermostat. The ACC+ and ACC- power an accessory like a humidifier. You need to identify what the ACC wires are powering so we can advise how to wire that accessory to the Nest Learning Thermostat.

AC Cooling Wizard

Re: How to wire new Nest Thermostat

jono428 — Sat, 05 Aug 2023 11:21:47 GMT

Sorry, it’s a Carrier TP-WEM01 thermostat and yes I have a whole house humidifier.

Re: How to wire new Nest Thermostat

CoolingWizard — Sat, 05 Aug 2023 16:13:36 GMT

Does the whole house humidifier have its own humidistat?

AC Cooling Wizard

Re: How to wire new Nest Thermostat

jono428 — Sat, 05 Aug 2023 20:16:24 GMT

Nothing that I control independently. I just open the vent in the winter and change the filter.

Re: How to wire new Nest Thermostat

CoolingWizard — Sun, 06 Aug 2023 01:48:10 GMT

@jono428 ,

can you follow the cable and see if the two wires both go to the humidifier? It is likely the Orange and the Brown wire will be cross-connected to a second cable going on to the humidifier. Can you possibly confirm that?

AC Cooling Wizard

Re: How to wire new Nest Thermostat

zoeuvre — Tue, 08 Aug 2023 20:02:34 GMT

Hi folks,

@jono428, thanks for reaching out, and for showing interest in our Nest Thermostats. I want to check if you managed to see the response above. Please let us know if you still have questions or concerns, as we'll be willing to assist you more.

I appreciate your help, @CoolingWizard.

Best,

Zoe

Re: How to wire new Nest Thermostat

jono428 — Wed, 09 Aug 2023 01:09:09 GMT

Thank you. Yes, I saw the response. I’m not sure how to go about following the wires so when I have more time I’ll take a look.

Re: How to wire new Nest Thermostat

CoolingWizard — Wed, 09 Aug 2023 03:54:46 GMT

When I say follow the wires, I should have stated, go to the indoor air handler and verify the connections. Need to see where the Orange and the Brown wires are connected to

AC Cooling Wizard

Re: How to wire new Nest Thermostat

jono428 — Fri, 11 Aug 2023 17:06:40 GMT

Here is a picture of what is running to the humidifier

Re: How to wire new Nest Thermostat

CoolingWizard — Fri, 11 Aug 2023 18:31:57 GMT

That is just a water solenoid valve. Energizing that simply turns the water to the humidifier on.

AC Cooling Wizard

Re: How to wire new Nest Thermostat

jono428 — Fri, 11 Aug 2023 19:21:39 GMT

Ok. Here's a picture of the inside of the air handler.

Re: How to wire new Nest Thermostat

CoolingWizard — Fri, 11 Aug 2023 19:35:09 GMT

You have a 2-stage gas furnace. There should be a control board where the wires enter the cabinet. That is where the thermostat wires are connected. Since you have a Gas Furnace, you have a Duel Fuel system. Gas and Electric.

AC Cooling Wizard