Whirlpool Dryer WED4950HW: Loud Vibrating Noise... | appliancefaults.com

Technical Background:

The WED4950HW dryer uses an MCU to control motor operation, heating element activation, and cycle timing. Vibrations are typically mechanical issues, not controlled by the MCU directly. Voltage supplied is 120V AC for controls and 240V AC for the heating element.

Symptoms:

The US homeowner reports a loud vibrating noise coming from the Whirlpool WED4950HW dryer, particularly when running, and it's causing the dryer to vibrate against the wall.

Possible Causes:

Dryer not level
Loose blower wheel
Worn drum support rollers
Debris caught in blower housing
Damaged or worn drum glide (slider) bearings

Solution:

1

Unplug the dryer from the 120V AC outlet.
2

Level the dryer using a bubble level on top. Adjust leveling feet with a wrench until level.
3

Remove the lower front access panel using a 1/4-inch nut driver.
4

Inspect the blower wheel for looseness or debris. Remove any obstructions.
5

Remove the dryer belt and drum. Inspect drum support rollers for wear or damage. Replace if necessary.
6

Inspect the drum glide bearings (sliders) at the front of the dryer drum. Replace if worn or damaged.
7

Reassemble the dryer and test.

Safety Warning:

Lock Out/Tag Out (LOTO) the dryer by disconnecting it from the power source before any disassembly. The dryer operates on both 120V AC and 240V AC circuits. Exercise caution to avoid electrical shock.

Prevention:

Clean the lint filter after every load. Periodically (every 6 months) inspect and clean the dryer vent ducting to prevent lint buildup. Check the dryer's leveling and stability to minimize vibrations.

Expert Tip:

A simple trick to diagnose drum roller noise is to manually spin the drum with the belt removed. Listen closely for grinding or squealing sounds, which indicate worn rollers. Order the rollers and belt together, they are wear items.

Frequently Asked Questions

•How do I remove the dryer drum to inspect the rollers?

First, disconnect power. Then, remove the front panel and belt. Disconnect the wire harness from the drum light (if equipped). Lift the drum slightly and pull it forward, out of the cabinet.

•What type of grease should I use on the drum support rollers?

Use a high-temperature, non-melting grease specifically designed for appliance applications. White lithium grease is commonly used.

•Is there a service manual available for the WED4950HW dryer?

Yes, service manuals are often available online through appliance parts retailers or technical document providers. Search using the full model number. The service manual will have detailed disassembly instructions.

Whirlpool Dryer WED4950HW: Loud Vibrating Noise Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I remove the dryer drum to inspect the rollers?

•What type of grease should I use on the drum support rollers?

•Is there a service manual available for the WED4950HW dryer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: