OK, I'm sure this has been covered, but I couldn't find it with a search. On my 96 Contour, with the blower switch turned to high, it will run for about 20sec and then shut off. (It doesn't blow out the defrost or anywhere else, it just quits.) You can turn it back to low speeds 1,2 and 3 and it works fine. But high speed for only about 20sec.

The AC is out so I would like to at least have the high speed blower for summer. Thanks for your help!