Need a new wiring plate for Nest E thermostat

[WookieeStink]

Hi, I recently completed some work on my AC system involving the 24VAC at the compressor.  However it appears something I did caused my 1st floor Nest E thermostat to not recognize 24VAC on the red wire.  Debug included measuring 24VAC betwee red and blue (common) and that checks out.  I also confirmed proper 24VAC from the furnace control board, that checks out.  In swapping thermostats between 1st floor and 2nd floor I found the problem follows the wiring plate for the 1st floor thermostat.  Meaning not only did I swap thermostats, but I also swapped wiring plates and found the 1st floor wiring plate is the issue.  Somehow I burned something out on it.  That is truly confirmed now.

How do I proceed to buy a replacement wiring plate for the Nest E?  Thanks.

EDIT:  I unscrewed the back of the wiring plate and confirmed there are a few areas with burn marks, looks like two diodes burned out.  Would post a pic but not able, lots of interesting active components, it's not just a passive wiring cross connect.

[chaconmorales]

Hi @WookieeStink,

Thanks for reaching out to the Community. I understand that you're interested in getting a new base plate for your Nest Thermostat E. I’d be happy to help you with that. Let’s check it out.

To assist you better, we'll need some additional information. I'm sending you this form where you can provide all the necessary details and also please fill out all the information required.

Once you've completed the form, please let me know. This will allow us to investigate the issue further and find a solution.

Regards,

Mario

[WookieeStink]

Thanks Mario, form submitted.

[ovidioj]

Hello @WookieeStink,

Thanks for replying. 
We've received your form and appreciate the details you provided. Please keep an eye on your email, as someone from my team will contact you shortly to help.

All the best, 
Jorge