have a Q! has enyone had a problem with your fan doin crazy stuff? i will be driving and it will go from setting 2 to 5 full blast! i have to shut the truck off and cycle the switch from off to 5 and it will go off! this is with the truck off!!!!!! also it has happened 2 times where i have went into a stor and i come out and the fan is running full blast! anny ideas thanks~!