I have a Bryant 395cav060 gas furnace that is the back up heat for our heat pump. Our thermostat is telling the furnace to come on but it's not responding. There are no error codes flashing on the furnace control board. THe heatpump uses a Honeywell thx9241 thermostat that appears to be working correctly. If I force the furnace control board into diagnostic mode I seem to get four sequencse of short flash long flash. I'm not sure how to read this.
The red lamp is normally just on, with no flashing. Any thought on this?

No code? You got a bad thermostat or bad thermostat wire. Jump R to W at the moat or furnace and see what happens. Door switch on the furnace will need to be taped closed if doing test at furnace with door off.