probably the board its the weakest link. Try "fan on" on the thermostat to see if the blower kicks on. Usually this is a different relay. If that works you can temporarily change the thermostat over to electric heat and it will do this automatically. Does the flame stay on for a minute or more before shutting down like overheating, or does it shut off after about 3-5 seconds, flame not sensed. Looks like your board is new enough to flash you some error codes. You can test the motor by jumping a motor tap to hot.
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