Cleaning the condenser coil with some Nu-brite and straightening any bent fins (a flat head screwdriver will work) would be the first place I'd start but I agree with Junkcrzr that you should check if the fan is working.
Just ordered my set and can't wait to get it installed! I just removed the little brown box and man that was a royal PIA, mainly because mine was at a slight downward angle so I couldn't get a good lock with my screwdriver. What I ended up having to do was break the screw loose from behind with...
I actually tried to heat it up with a hair dryer to flatten the bubbles but ended up with some of the material flaking off. The PRND2L peice is just a sticker put on from the inside. After 20 years, I think mine was just too far gone to repair. Maybe someone else has a better repair?