This has happened to me twice. The first time one of my condensor fan motors stopped. You have two, one at the front, lower left and one right, lower intakes below the bumper. If you listen, you can hear each fan running or not. The second time, I was losing refrigerant, as mentioned, and my evaporator died. Cost wise, pray it's the first problem.
<------Those are the intakes, to the left and right of my wife's ankles :biggrin: