Won't stay lit. error status is 5 blinking lights. Can be reset after disconnecting and reconnecting power. Sometime may be started by turning off and then restarting. Sometime igniter will begin to glow, but stops quickly before the gas starts. The small top blower is running and the large bottem blower comes on almost immediately when ignition fails

5 flashes = rollout switch open or rollout detected

No inducer mote,r no flame ignite, blower running
9 flash on board. Disconnect limit switch for main blower and induction motor starts 5 flash on board
I replace limit switich on at 190 off 40