Ok. have you tried to replace the switch on the dash this is the first thing to check, also I believe on your car there are ducts, air hoses, blask plastic running under the dash, look under the dash to see if you can locate it it might be that the hose just fell off. The switch will run you about 10-20 at a junk yard and is very easy to replace. If that is not the problem please let me know and I will tell you where to go from here.