during the summer I was driving with my AC on and the fan setting 1 stopped working.... No biggie I turned it to #2 setting, That worked for about a week then that one went out.... so I would use setting 3.... That one went out a few days later. It cooled off and I don't use my AC any more, but now that its getting colder in the very early morning I turned on my heat and it reminded me its full blast fan or nothing, I know its a matter of time before that goes out and I have no heat, I would like to get it fixed this weekend. Any one know what this could be? I Think it could be the fan knob/switch it self that has gone bad.... but I have no idea how it works, I never pulled the dash apart yet. Any ideas?