air conditioner stopped blowing cold air on 2002 Ford Escape

Air conditioner stopped blowing cold air; only bows warm air. Car has 125,000 miles. Air conditioner has never had any problems until now.

Asked by for the 2002 Ford Escape
Probably low on refrigerant.Easy enough to recharge with a kit from Advance Auto,or any auto parts store.(Even a place like Jiffy Lube will do it) Not unusual for a car that age or mileage.My 2002 Taurus has needed an annaul recharge,once ,may be twice, for a few years now.
If it goes warm in short order,you have a leak in the system,possibly a bad compressor,and that gets expensive.