![Nest Learning Thermostat: Installation, battery issues, and the importance of the "C" wire : Caffeinated Bitstream Nest Learning Thermostat: Installation, battery issues, and the importance of the "C" wire : Caffeinated Bitstream](https://cafbit.com/resource/nest/nestwiring.jpg)
Nest Learning Thermostat: Installation, battery issues, and the importance of the "C" wire : Caffeinated Bitstream
Nest thermostat not seeing the C wire but it's there... | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
![Some very appreciated help! Honeywell to Nest. Unfortunately I was not able to heat just cooling. * blue wire is not connected on the central that is why is not plugged. : Some very appreciated help! Honeywell to Nest. Unfortunately I was not able to heat just cooling. * blue wire is not connected on the central that is why is not plugged. :](https://preview.redd.it/8mydrebkfnm81.jpg?width=640&crop=smart&auto=webp&s=ff5a565860cdfe39fe7135f625f6779416facac4)
Some very appreciated help! Honeywell to Nest. Unfortunately I was not able to heat just cooling. * blue wire is not connected on the central that is why is not plugged. :
![wiring - Can I just extend this blue wire in furnace for Nest thermostat? - Home Improvement Stack Exchange wiring - Can I just extend this blue wire in furnace for Nest thermostat? - Home Improvement Stack Exchange](https://i.stack.imgur.com/6my9i.jpg)
wiring - Can I just extend this blue wire in furnace for Nest thermostat? - Home Improvement Stack Exchange
![Please help me connect the blue "C" common wire in boiler control board for Google Nest Thermostat : r/Nest Please help me connect the blue "C" common wire in boiler control board for Google Nest Thermostat : r/Nest](https://preview.redd.it/please-help-me-connect-the-blue-c-common-wire-in-boiler-v0-x2pgkrtxxd4a1.jpg?width=691&format=pjpg&auto=webp&s=f1655697d864b1e2a0350e59d8d12cc1a469c917)