Performed a one system maintenance checking cooling, checked inside unit, checked amp draws and blower capacitor, checked coil, checked filter, evaporator coil is starting to accumulate rust, checked outdoor units pressures, amp draws, capacitor and contactor, all check out good. With Freon levels being good, system may have a small leak since Freon hasn’t leaked out yet. Outdoor coil could use a wash. System is operating properly at this time.