Capacitor Microfarad Check Common Fan Hermetic Tips Learn how to test a capacitor during AC maintenance with step by step capacitor testing tips for HVAC repair, including removing and discharging the capacitor safely, using a meter set to microfarads, and measuring between common to hermetic and common to fan terminals. This guide covers capacitance measurement, interpreting microfarad readings, recognizing signs of failed capacitors such as bulging or leakage, and when to replace a capacitor t