I had my A/C check up today and I got numbers from the tech.
Even though he said, I don't have a problem, I am cursious what the numbers mean. My unit is getting old and I kind of want to know if that will be good idea to replace my system before break-down. Since the quote I got from the A/C tech was more than I was gussing, I wish to use this system for at least another year. Mine is 14 years Goodman Model 4100 4ton.

Return air F: 78
Delivered F: 57
Outside Air : 87
Discharge: 240
Compressor Amp/rated 17/21
Condensor Amp/rated 19/1.3

Any help is appreciated.