Whirlpool Duet WFW92HEFC: Loud Roaring Noise During Spin... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) controls the motor speed based on feedback from a speed sensor. When the MCU commands a high-speed spin, it sends a varying AC voltage to the motor windings via the inverter. The voltage level is directly proportional to the target RPM. Abnormal noises can indicate mechanical failures within the motor, drive system, or tub support structure.

Symptoms:

The homeowner reports a loud, roaring noise emanating from the Whirlpool Duet WFW92HEFC washing machine specifically during the high-speed spin cycle. This noise is significantly louder than normal operation.

Possible Causes:

Worn or damaged drum bearings.
Foreign object lodged in the tub assembly.
Damaged or worn motor windings.
Loose or unbalanced motor pulley.
Failed or failing drive motor.

Solution:

1

Disconnect power to the washer at the breaker panel (LOTO).
2

Remove the top panel (usually with a 1/4-inch nut driver).
3

Inspect the drive motor and pulley for any visible signs of damage or looseness.
4

Manually rotate the inner drum. Listen for grinding or scraping noises indicating bearing issues.
5

Access the rear of the tub by removing the rear panel. Check for debris caught between the inner and outer tubs.
6

Using a multimeter, check the motor windings for continuity (refer to the service manual for specific resistance values).
7

If bearings are suspected, the entire tub assembly may need to be replaced by a qualified technician.

Safety Warning:

Always disconnect the appliance from the power supply before performing any repairs. High voltage is present in the control circuits and motor. Lockout/Tagout (LOTO) procedures must be followed.

Prevention:

Regularly inspect the washer for unusual noises. Avoid overloading the machine. Use the correct amount of detergent. Periodically check the drain pump filter for debris.

Expert Tip:

Try running the washer through a drain/spin cycle with the rear panel removed (after disconnecting power and re-connecting). Carefully observe the motor and tub movement to pinpoint the source of the noise. Note the spin speed at which the noise becomes most pronounced. You can access the service mode by pressing and holding the End of Cycle signal button, then pressing the Start button three times within 5 seconds. This allows you to run diagnostics and test individual components.

Frequently Asked Questions

•What is the resistance I should expect to see on the motor windings?

Refer to the Whirlpool Duet WFW92HEFC service manual for the specific resistance values of the motor windings. These values vary depending on the motor type. Typically, you should see a low resistance (a few ohms) between each winding, and a very high resistance (megohms) between each winding and the motor frame.

•How difficult is it to replace the drum bearings on this model?

Replacing the drum bearings on the Whirlpool Duet WFW92HEFC is a fairly involved process. It requires special tools to disassemble the tub assembly and press the old bearings out and the new bearings in. It's recommended that only experienced technicians attempt this repair, or the entire tub assembly should be replaced.

•What type of grease should I use on the new drum bearings if I replace them?

Use a high-quality, waterproof, high-temperature bearing grease specifically designed for washing machine applications. Avoid using general-purpose grease, as it may not withstand the operating conditions and could lead to premature bearing failure.

Whirlpool Duet WFW92HEFC: Loud Roaring Noise During Spin Cycle - Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the resistance I should expect to see on the motor windings?

•How difficult is it to replace the drum bearings on this model?

•What type of grease should I use on the new drum bearings if I replace them?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: