Replace Blower Run Capacitor

Replace the Blower Motor Run Capacitor

Verify that the existing capacitor the correct MFD rating and is it within 10% of rated MFD when replacing a run capacitor

Three popular methods of checking run capacitors … (1) STATIC TEST > Disconnect all wiring from the capacitor and reading MFD across the terminals with a properly equipped meter. … (2) LOAD TEST > Read the amperage of the start and run windings together inside the amp meter clamp. Then read the amperage of the common winding. If the readings are within .5 amps the run capacitor is ok … (3) CALCULATED LOAD TEST > Record the voltage across the capacitor leads. Record the motor amp draw on the common leg.  Actual MFD capacity = 2652 x start winding amps / run cap voltage

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