2011 Lennox ac low on refrigerant and bad capacitor. Customer expressed that unit was recharged a couple years ago. Informed customer about the options for leak search, cost to replace a coil out of warranty as well as charging the system or/and replacing. Customer decided to replace capacitor and charge the unit. Aware that it’s hard to tell how long it will run before gets low again. Left unit with new capacitor, clean condenser, and super heat within range.