My 1992 Honda prelude has great AC, when it works. Sometimes for no
apparent reason, the green light under the AC button goes off and the blower
continues to blow the outside air in without cooling it first. Sometimes I
can push the button in repeatedly and it will come back on.
I thought it might be the switch until I noticed that the rear defroster has
the same problem of coming on and off. They seem to both work or not work
at the same time.

Thanks for your input,

Wesley