Frigidaire Furnace Gas Forced hot air - inducer on, no glow in ignition element, two red flashes on circuit board indicating pressure switch fault - took off the connecting pipe between pressure switch and draft inducer and tried to clear inducer nipple of possible debris with a piece of wire - worked! Is it possible to get obstructions in the draft inducer nipple that would cause this or am I just lucky, and still have an on-going intermittent problem?

Sounds like you might be lucky do the pipes run through the roof or out the side wall check the ends of the pipes also check your drain sometimes that will plug and give you the same code