![20+ year old Trane XV80 gas furnace - can I use thermostat "B" connector as the "C" wire? : r/hvacadvice 20+ year old Trane XV80 gas furnace - can I use thermostat "B" connector as the "C" wire? : r/hvacadvice](https://preview.redd.it/20-year-old-trane-xv80-gas-furnace-can-i-use-thermostat-b-v0-jf5q3eooc4aa1.jpg?width=1080&crop=smart&auto=webp&s=7747bb101af5c59061ffbd5d7b4702b1da273793)
20+ year old Trane XV80 gas furnace - can I use thermostat "B" connector as the "C" wire? : r/hvacadvice
Fred's Heating and Air - New Trane XV80 Furnace, XR13 AC, CleanEffects Electronic Air Cleaner. Re-used existing humidifier based on customer request. | Facebook
![20+ year old Trane XV80 gas furnace - can I use thermostat "B" connector as the "C" wire? : r/hvacadvice 20+ year old Trane XV80 gas furnace - can I use thermostat "B" connector as the "C" wire? : r/hvacadvice](https://i.redd.it/20-year-old-trane-xv80-gas-furnace-can-i-use-thermostat-b-v0-alp817mrc4aa1.jpg?width=2560&format=pjpg&auto=webp&s=62128711fff6546e9d419796279416e7cf5e947d)