I live here in hot Sacramento CA. My 16 year old Trane XE 1100 model Seer 11 TTN048SC100AC 4 ton unit blew a 50mfd 440v capacitor last August. Here it is 14 months later and it blew again. My trusted repairman said it is drawing high amperage which is blowing the Capacitor, probably because the compressor is old and going out. I opted to try another capacitor and that solved the problem for the time being. I don't want to have to change out both the Heater and AC at great expense. I could have the compressor replaced. I figure that would give it another 15 years, but wonder if this is wise. Don't know if I can keep a R-22 unit going for 15 more years since the change-over to new refrigerants. I am also afraid if I don't replace the compressor now it won't be available in the future, and then I will definitely be forced to put in new heat and air. Thanks in advance for your thoughts.