Testing an AC capacitor is important for ensuring your HVAC system is running efficiently. You typically need a multimeter set to the capacitance setting. First, disconnect the power to the unit and discharge the capacitor. Then, connect the multimeter to the capacitor's terminals to check the reading against the manufacturer's specs. How comfortable do you feel performing these tests yourself? Have you encountered any specific issues with your AC unit that make you suspect the capacitor might be at fault?