dpipes
Apr 3, 2011, 05:05 PM
What is furnace twinning?
Fr_Chuck
Apr 3, 2011, 05:17 PM
Two furnace units
What is the issue or problem you are having
https://www.askmehelpdesk.com/heating-air-conditioning/twinning-error-code-but-only-one-furnace-311500.html
mygirlsdad77
Apr 4, 2011, 03:43 PM
Yep, Fr_Chuck is correct. Twinning is when they hook two or more units together. Usually there is a twin spot on the board for thermostat connections, so both units can be controlled off one thermostat.