![Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot](https://images.thdstatic.com/productImages/bff2c7f8-d99a-4032-966a-4655aa12b5ad/svn/fast-stat-thermostat-sensors-fscm00-4f_600.jpg)
Fast-Stat Common Maker Thermostat Wire Extender (Adds a Common C Connection) FSCM00 - The Home Depot
![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
![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/UMWdp.jpg)
wiring - Can I just extend this blue wire in furnace for Nest thermostat? - Home Improvement Stack Exchange
![Am I doing something wrong here connected Honeywell C wire adapter and hooked up the new thermostat. AC is on and blowing cold, but the screen does not power on any advice? : Am I doing something wrong here connected Honeywell C wire adapter and hooked up the new thermostat. AC is on and blowing cold, but the screen does not power on any advice? :](https://preview.redd.it/am-i-doing-something-wrong-here-connected-honeywell-c-wire-v0-31gd2vfg95nb1.jpg?width=640&crop=smart&auto=webp&s=9fd092c15d2682bc324127a76ee912d495e9a873)