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Customer Questions and Answers for Capacitor by Whirlpool

4.89 (64)
By: Whirlpool
Part Number: OEM18040314
Manufacturer Part Number: WP8572720

The Capacitor is an OEM part for Whirlpool washers that starts the motor by storing electrical energy and releasing it when the washer begins its cycle. This part ensures the washer operates smoothly from the moment it starts, providing the necessary jolt to the motor that enables it to begin its various functions, including spinning and agitating. 

Causes of a bad capacitor can vary. Electrical surges can harm its internal components, while wear and tear over time may result in a reduced capacity to hold a charge.

Symptoms of a failing Capacitor include:

  • The washer failing to start.
  • A humming noise when the washer is supposed to begin its cycle 
  • The washer starting but then quickly shutting down due to insufficient power to the motor.

This OEM Whirlpool part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper and some Kenmore models.

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Questions & Answers

For Whirlpool Capacitor (Part Number: OEM18040314)

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Ep for Model Number Kitchen Aid Washer, model KAWE670BWH0

Will not agitate. Timer does cycle through all cycles... fills with water - does not agitate - drains water and spins and rinses and respins. Have taken cabinet off. With cabinet off and water to machine shut off, jumped across lid switch and manually turned timer through cycles - motor not running in wash/agitate cycle but does run in spin cycle. There is a very very slight hum from motor when in wash cycle. Tried checking capacitor with a digital OHM/V meter but not sure of the results. Also, checked OHMs for the motor... start windings had a resistance of 5 ohms, high speed windings had a resistance of 1 ohm, low speed windings only got O/L, extra low speed windings had a resistance of 2 ohms, motor safety protector had a resistance of 0 ohms. Do you think I have a bad capacitor or bad motor or something else? Is there another test I can perform to be certain? Thank You.

Answer

EP, We're pretty sure your issue is not in the capacitor, WP8572720 or motor WP3350418 but most likely in the timer WP3946476. were the capacitor faulty, the washer wouldn't run in any direction, your motor does spin, so power is supplied through the capacitor to the motor. The resistance readings you supplied, are within the factory specifications Start winding 4 to7 ohms , low speed 1.5 to 3 ohms and high speed .5 to 2 ohms resistance. The same windings are used to make the motor run in both directions, the timer reverses the polarity through the wiring in order to change the motor direction. What you'll need to do is, remove power to the washer and access the timer. Place the timer dial in the regular wash cycle and pull the knob out like you would to start any cycle. Then using your meter, check across the two terminal contacts listed in the timer cam and cycle chart on the wiring diagram inside the control console, to see which contacts have an "open" or partial circuit.

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Answered by AppliancePartsPros.com   |   Monday, February 24, 2014

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