AC fan motor would sometimes not produce air flow from the vents. The issue was intermittent, sometimes I'd start the ol' studebaker and the AC would work normally, other times it wouldn't activate at all. If it worked, it worked until I turned the car off and started it up again, at which point it was a coin-flip whether it would work or not.

Evidently it didn't work when it was appraised at Carmax, much to my chagrin.