On my 2001 Jeep Wrangler I replaced the resistor and blower motor about 3 years ago for same issue… now today the highest Setting for the blower quit working!! Right when the dam temps are hitting over 100 degrees. I have a 2006 f150 225000 mi on it never had an issue not sure who the f..king ass…e is at Chrysler and thier garbage designs! But here is to to you you!!!! F..k you you f..king prices of shit engineering!!!! Rant over…