The unit itself is about 3 years old. Been acting up the last couple of days with random resetting. The circuit board has a single steady LED flash. The igniter glows bright red and I sanded the sensor, no flame. Any advice would be helpful.

Think I fixed the problem, the hose from the blower seems to not have been put on all the way. At least it lit and I hope this is the solution.

Maybe this will help someone else out with the same problem