The inducer has to start and run for 30 seconds to purger the heat exchanger B4 the igniter gets energized. If it only spins for a few seconds then the board may be faulty.
The sequence is inducer starts>pressure switch closes>purge 30 seconds>energize igniter.
Check the error code list on the back of one of the doors.
Make sure you got a a steady 24 volts AC from W to C on the board when calling for heat. If not that can drop out the board.
The sequence is inducer starts>pressure switch closes>purge 30 seconds>energize igniter.
Check the error code list on the back of one of the doors.
Make sure you got a a steady 24 volts AC from W to C on the board when calling for heat. If not that can drop out the board.