Arrived to do a performance maintenance. Set system for cooling. Found that the furnace filter was impacted with debris. Replaced filter. Measured the systems static pressure and measured a temperature split between return and supply air. Checked interior of the furnace for cleanliness. Found that the blower wheel is collecting dust. Went outside and verified refrigerant levels. Verified operation of all electronic and mechanical components. Found that the capacitor for the condenser is failing on the compressor circuit. Replaced capacitor and cleaned up the electrical cabinet. Tightened all connections to and from the condenser control board so we can hopefully get more than a year out of the new capacitor. Rinsed coil free of debris. Spoke with homeowner about the system. Air conditioning system is operational at this time.