You can check the electric motor capacitor by using a multimeter to measure its capacitance. If the reading is significantly lower than the rated capacitance, it indicates a faulty capacitor. Additionally, visual inspection for bulging or leaking capacitors can also help identify a faulty one. Q Can I replace the electric motor capacitor myself?
Use the DC setting and terminals. Test the Motor Capacitor: attach the ohmmeter's leads to the capacitor's terminals, one pair at a time and check the reading on the ohmmeter. Infinite resistance: If the ohms reading stays at a very high value or at infinity then the capacitor has an open circuit internally and is probably shot.
Checking the capacitor is an important step in troubleshooting motor issues and can save you money by avoiding unnecessary repairs or replacements. In this guide, we will walk you through the process of checking an electric motor capacitor to determine if it is faulty or in need of replacement.
Discussed here: description of electric motor capacitor test procedures to determine if a capacitor is damaged or working normally & test procedures to measure the capacitor's capacitance or microfarads, MFD, or uF to determine if it is working within its rated capacitance range.
Compare this value to the expected capacitance value, which can usually be found on the capacitor itself or in the motor’s manual. If the multimeter reading is within a reasonable range of the expected value, the capacitor is functioning properly.
Test the start or run capacitor. Most capacitors are protected from damage by a metal cover on the exterior of the motor. Remove the cover to access the capacitor, then check it for leaking oil, bulges in the container, holes in the container, or smoke residue. Or, check the capacitor electrically with an ohmmeter.