We have a carrier weathermaker sx 1987 and our fan is constantly on, but no heat.
This after a 6 day period of no power and we were using the generator to power the furnace intermittently, through back feed.
Checked thermostat doesn't look like it is getting 24 volts.
Induction motor/ blower not working.
Checked R & C no volts
Yes we have Propane, filter changed recently.
58SX100-JG_1

Generators & electronics are generally not a good mix. Check the fuse on the board. If it is not blown, you've probably either fried a board or at least a transformer.