Upon arrival the compressor and the suction line was iced up. Because it was so hot out the ice melted quickly. We found the air filter was extremely dirty. Replaced the air filter. It was a 25x16x1. The humidifier that was on the back of the furnace has melted and left a gaping hole in the ductwork. It was disabled and non functional so We removed the humidifier and patched the ductwork. I had to add 2lbs of r22 refrigerant. There was a 18*f delta t. The unit is working properly. The unit is from 2001. Also noticed that the flue pipe for the furnace was paper thin and very brittle. Will need to quote out a price to replace it before heating season.