AC performance tuneup times one system. Inspect blower compartment and recommendation today is to have that cleaned. Price is in the estimate provided today. Check out door unit. System is R22. Advised tenant David Cook that if he decides to buy there are other recommendations today. System is 16 years old. There is no disconnect on the outdoor unit to interrupt power from the electrical box inside the home. Another recommendation would be to install a in-line float switch that will interrupt the contactor outside if the drain clogs up. Wash condenser coil outside. Tested capacitor and contactor. System is cooling at this time. Given the age of the system I would recommend changing out complete 3 ton upflow.