I have a '94 Explorer. The A/C condenser works, but the air will not blow out of the vents. Well, not reliably, anyway. Sometimes it will work perfectly, other times it won't turn on. Sometimes it will start to blow as I drive, other times not for a few days. I'm not sure where to start. I have the Haynes book, but it doesn't let me know if I get to the unit from inside the passenger cab or through the engine bay. It's too hot in Savannah to not have air conditioning.