I have old A/C unit and weather over here in Texas is reaching triple digits now. I don't plan to replace my unit just because of age. But, I definitely don't want to be stuck in sudden break-down and hot house.
I got my annual check-up and always got a recommendation from a techniain to replace the unit for 3 years straight. Mine is 18 years old.
I am just curious if there are any signs that I can notice before sudden break-down. I am quite worried about compressor this year since it had locked once. I plan to replace the unit probably before next summer.