I bought a condo in Palm Springs last November. Summer temps have been getting up to 121 degrees. My >20 year old air conditioner will only cool to 79 degrees at the coolest part of the house. It is uncomfortably warm in other parts of the house. It passed the home inspection with a 16 degree differential intake/vent. I had my home warranty company send out a tech (twice), who added freon, fixed a leak, etc., and tested the system. Bottom line: the tech could not find anything wrong with it, but says it is not working as well because it is an older unit and worn out. My home warranty company won't replace it because they say it is not broken or "inoperative" (contract wording). I am getting a second opinion and will probably replace it, but I would like to fight the home warranty company over the definition of inoperative. They say that means it is not working at all. I say if it doesn't cool the house down to a comfortable temperature it is "inoperative". Are there any standards out there that state what a reasonable room temperature is for residences? Thanks.