I took some time, but I have figured why my aux fan would not work.there is a switch on the drier that is partly red in color disconnect the two wires start the car. the fan sould be running.you will have to replace the switch.Im not sure if it would loose the freon if you unscrewed the old one.you may need to take the car to someone that can save the freon. give them the new switch and have them replace it.then put back the freon,and check to see if it needs more.good luck miker