Update: After calling the tech rep I checked the sail switch and found nothing hindering its operation, so then I pulled out the electrode and checked the continuity of the electrode and wire to pc board, and the ceramic surround was not cracked...All looked clean and good except that the two electrode pair seemed to have too wide of a gap (about 1/4"), so I squeezed them a bit closer together (to about 1/8") and reinstalled electrode back into furnace...Now all works perfect again!!
Best Regards,
3 tons