topic Re: Nest thermostat not compatible? in Nest Thermostats

Nest thermostat not compatible?

Espressolover — Mon, 10 Oct 2022 15:13:47 GMT

I'm replacing my Trane thermostat (3.5-ton heat pump) with a Nest, I've 5 wires: R, Y, B, W, G. Following the Home app, it initially told me the G wire was not detected, I left the B wire unhooked when I tried it, only got heat from the air handler, no-way could I get cooling. I hooked up the B wire with the same results. At that point, I gave up and reinstalled the old thermostat. Any help is really appreciated.

Thank you

John

Re: Nest thermostat not compatible?

Patrick_Caezza — Tue, 11 Oct 2022 07:51:15 GMT

Post a picture of the original thermostat's wiring

Re: Nest thermostat not compatible?

Espressolover — Tue, 11 Oct 2022 16:35:06 GMT

Thank you for the help.

Re: Nest thermostat not compatible?

Jeran — Fri, 14 Oct 2022 18:06:13 GMT

Hey there Espressolover,

Just out of curiosity, when you connected your Nest Thermostat, did you remove the jumper wire? If so, were you using a C wire or a Nest Power Connector with your Nest Thermostat? It's a possibility either the wires weren't seated properly, or perhaps the Thermostat wasn't receiving enough power to the unit.

I look forward to your response!

Thank you,
Jeran

Re: Nest thermostat not compatible?

Espressolover — Fri, 14 Oct 2022 22:44:37 GMT

Hi Jeran,

Yes, I did remove the jumper wire. I installed my wires to the Nest Connector: each individual wire, B to B, G to G, Y to Y, and R to R. The B or blue wire left it off, I also tried connecting it to C and *OB of the Nest connector, and the result was in Cooling mode I was having Heat, and I was actually never able to get cold air even though the Nest was in the cooling mode. I have a 3.5-ton Trane Heat Pump. Thank you for your help

Re: Nest thermostat not compatible?

EdwardT — Sat, 15 Oct 2022 16:11:24 GMT

Hi folks,

@Patrick_Caezza and Jeran, thanks for the help!

@Espressolover, thanks for posting a photo of your current thermostat's wiring. I'd love to know more about this. Could you also share a photo of the control board of your HVAC system?

Thanks,

Edward

Re: Nest thermostat not compatible?

Espressolover — Sun, 16 Oct 2022 06:35:18 GMT

Hi Edward, I have the next best thing: the thermostat schematic.

Re: Nest thermostat not compatible?

EdwardT — Wed, 19 Oct 2022 17:40:13 GMT

Hi Espressolover,

Thanks for the response. We'd like to know more about this. Please fill out this form so we could investigate further.

Thanks,

Edward

Re: Nest thermostat not compatible?

Espressolover — Sun, 23 Oct 2022 14:54:46 GMT

What happened? I did fill out the form and submitted it but got no answer.

Re: Nest thermostat not compatible?

Jhonleanmel — Sun, 23 Oct 2022 19:47:20 GMT

Hey there,

@EdwardT, thanks for the help.
@Espressolover, we got your form — thanks for filling it out. Keep your lines open as our team will reach out to you via email anytime soon.

Also, please continue the conversation there as this thread will be locked after 24 hours.

Cheers,
Mel