My footwell vents weren't working, pushbutton response was never consistent, and the whole thing just seemed flukey. Bought a reman unit with a 3yr warranty a week ago for @ $175, put it in, and the problems are solved. I'm extremely short of time and simply couldn't devote the 1/2 day it would probably take to go through all the valve and switch tests and since the unit was original, and my feet were freezing by the time my 1 hour commute ended in Mass, I took a shot at a quick fix, assuming that there was a pretty good possibility. Guess I finally got lucky. Now if I can only find the time for the valve clearance check I've been trying to get to for the past 6 months (150k since the last one 3 years ago when I bought the car).

84 300 CDT
290,000 miles
oil changed religously every 3k