Mine did pretty much same thing - although i never got warm air out side and cold in center...and mines a 87. In mornings (when I didnt need AC) it worked fine. Then in middle of hot day, blower wouldnt come on.

I checked that strip fuse 1st, but was thinking since it worked intermittently, how the heck does a fuse cause that?@

Well, it turned out the screws holding stip fuse to contacts werent making good contact. New strip fuse, old bolts.

Long story short (literally!), short a wire to momentarily bypass strip fuse across 2 bolt heads. See if that gives new life.

__________________
Paul
Benz-less
I need an SDL !