2002 Kia Sedona EX with 86,000 miles. This last summer when we started the Kia with the AC left on the blower motor fuse would blow. When we replaced the fuse and turned off the AC before starting the blower worked fine. A mechanic tried to find and fix the problem and blew the resistor assembly for the AC blower speed. He replaced this unit and it blew again. Now the blower only works on high (4) for AC or heater and as far as we know the original problem still exists. Any suggestions on what is wrong and how to fix it? Thanks!