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Why does Nest say my system is not compatible?

DEVOE-IV
Community Member

Hello all, I need some help.

My house is less than a year old and I'm replacing a Honeywell U Lyric T6 Pro/TH6220WF2006.

The compatibility checker is saying that my system is not compatible with the Google Nest 3 learning thermostat I just bought. Everything seems straightforward, except for the two "S wires". Maybe that is what is throwing things off? Any help would be very necessary. Thank you all very much.

 

PXL_20230107_060342619.TS_exported_7402_1673073118045.jpg

 

 

 

 

Electric Heat with heat pump

4 REPLIES 4

DEVOE-IV
Community Member

*Update* I wanted to add the wiring diagram of the current Honeywell U Lyric T6 Pro.*

2023-01-06 22_44_32-33-00323—04 - T6 PRO Wiring Diagrams.png

Jhonleanmel
Community Specialist
Community Specialist

Hi DEVOE-IV,

 

Thanks for posting and for the photos.

 

Your system can be setup with the Nest Learning Thermostat to accommodate your system, but no need to connect both the S-wires. 

 

Wires labeled S or S1 can be indicator lights or sensor wires. The Nest thermostat uses its LCD display instead of an indicator light and gets sensor information, like outdoor weather conditions, over Wi-Fi.

 

Best,

Mel

Hey there DEVOE-IV,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Mel

Ebedia
Community Specialist
Community Specialist

Hi everyone,

@DEVOE-IV just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

I appreciate the help, Mel.

Regards,
Emerson