your ac works right? it is just a light problem..... (thats more of a question) if it is a illumination problem, (i've never done it) but see if there is a bulb in there. was the light working before? go to the yard and find another switch, those things are "pocket" size, (i know Jay is not a big fan of junk yard switches
) but it could be a very inexpensive trouble shooting isolation procedure. all else fails. the blower is working on all speeds and you have ac,,, screw the light.....
lets us know the out come
jake