W wire not detected

[Langer_s]

I have tried several times to install my new Nest thermostat today. I can get it to work on the cool function but it does not recognize the W wire. I checked the end of the wire and trimmed it for good measure but it still is not detecting the wire.

[Markjosephp]

Hello Langer_s,

I appreciate you reaching out to us regarding the challenges you've encountered while installing your new Nest Thermostat. Thank you for providing specific details about the problem, particularly in relation to the W wire not being recognized despite your efforts in troubleshooting, such as checking and trimming the wire.

To provide you with the best assistance, can you share with us a photo of your old thermostat and Nest Thermostat's wiring setup? What is the make and model of your HVAC system? Also, what is the wiring report or message code that you see?

I'll look forward to your response.

Best,
Mark