[still working(NOT)]

dealer tech said yesterday if sail switch was faulty the furnace would not run. I took off the outside panel and we have a 1 flash on the led which is a limit switch/air flow problem. Restarted again. This time there was no short burst of ignition and as we speak it is still running and hopefully getting to temp inside. At this point, I think there is some backwash of air on ignition because the panel is off.