topic Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!! in Nest Thermostats

Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Sat, 14 Dec 2024 16:19:56 GMT

Good morning, all - I'm in limbo land - I recently moved over to a 3rd Gen Nest Thermostat from a Honeywell unit. All "seemed" to be going well until the breaker began tripping intermittently, and now I have REAL concerns b/c I'm smelling a burning odor and the breaker panel is HOT! Hoping someone from this community can help me quickly resolve my issue. Thank you in advance.

Context:

Trane Furnace

Air-to-air heat pump

1 stage cool/2 stage heat (heat pump & electric)

3rd gen Nest Thermostat

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Sat, 14 Dec 2024 16:21:35 GMT

I'm not seeing a way to upload reference photos of the wiring layout - before and after - can someone jump in to assist? Thanks community!

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

MplsCustomer — Sat, 14 Dec 2024 17:24:17 GMT

@jtharness

If you are logged into this forum (by clicking on the blue profile icon in the upper right corner of the screen) BEFORE you click on "Reply", you get a camera icon; clicking on that will let you upload a photo.

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Sat, 14 Dec 2024 18:10:05 GMT

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Sat, 14 Dec 2024 18:12:40 GMT

I’ve programmed * for emergency heating. Was x2 in prior wiring arrangement on Honeywell unit.

The breaker keeps tripping and I’m hoping that this community can help me understand what I may or maybe not be doing properly with the Nest wiring. Thanks again!

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Sat, 14 Dec 2024 18:26:16 GMT

Honeywell wiring configuration:

Y2 - Brown wire

X2 - Black

W1 - White

RC/R - Red with jumper

O - Orange

Y - Yellow

G - Green

B - Blue

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Sat, 14 Dec 2024 18:29:13 GMT

Thanks for the assist!! Photos uploaded to assist with diagnosis and any recommended fixes.

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

GabrielaG — Mon, 16 Dec 2024 20:33:27 GMT

Hi jtharness,

Thanks for reaching out to the community. I'm sorry to hear that your Nest Learning Thermostat third generation is giving you trouble. It smells like it's burning, and the breaker panel is hot. I will try my best to help you right now.

My team would like to know more about this behavior. When you get a chance, please fill out this form. Remember to include the link to this post. Let me know when you’re finished. From there, we'll contact you via email.

Let me know when you're finished. Your confirmation is crucial to ensuring that I can follow up on your case effectively.

Let me know how things go.

Regards,

Gabriela

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Tue, 17 Dec 2024 18:31:25 GMT

Thanks, Gabriela - I just completed the form and am happy to supply supporting photos of my configuration/equipment settings if necessary to resolve my issue. Thanks

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

Patrick_Caezza — Wed, 18 Dec 2024 23:42:32 GMT

@jtharness

It looks like your wiring is mostly correct, I would make two changes.

Move the White (W1) wire to W2 and set it as AUX heat.

Move the Red (Rh) wire to Rc.

I would also suggest disconnecting all of the wire from the Nest base plate, powering the System back on, and seeing if it still trips the breaker.

Re: Breaker Trips/Burning Smell after installing Nest 3rd Gen - HELP!!

jtharness — Fri, 20 Dec 2024 02:54:10 GMT

Any reason for the move from RH to RC? I assumed they were interchangeable. Thanks so much for the assist. It’s GREATLY appreciated