AC light blinks and stops working on 2003 Mitsubishi Outlander

The car has been checked out twice and both times "cant find anything wrong'" The AC light will blink, start blowing hot air (stops working). After sitting awhile, it will work again. This is VERY frustrating. DO you recommend a second opinion or have others been experiencing this same issue? THey have placed dye to look for a slow leak and recharged it at this point.

Asked by for the 2003 Mitsubishi Outlander
you need a new mechanic.
pressre readings will tell the story. it sonds like it is icing up and shuts down till it de frosts.