The ac switch off light won't go out if I push it.

What is your question?

I had to refill freon the last few years and the ac was always working after I filled it up. During the wintet I always turn the ac with the switch "ac off" out. A couple month ago I had the heat/ac blower motor at a Mercedes dealer replaced. Never tried the ac after that and when I try to turn the ac ooff switch out, it did not work. I cI bought freon and attached it, had engine running, and it shows ac filling in green and ok.