Atwood Furnace issue AFMD30 or 35

First time out this past weekend. Ran furnace for 12 hours a day for 2 days, all good.
Come Sunday morning, not running when wake up.
Clearing fan comes on when starting from thermostat, no sparking, nothing.
Took cover off, hit reset, no help. Burner tube is clear, and compartment is clean. Pushed all connectors, then started up fine.
Ran furnace all night, all good. Home now.
Anything to check next time out?
thx