Speed Queen Washing Machine Loud Thumping Sound:... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) controls the motor speed and direction during the wash and spin cycles. Imbalance detection is typically handled by an accelerometer, which sends signals to the MCU. Excessive imbalance will trigger a shutdown or reduced spin speed to prevent damage. Voltage paths to the motor and associated components must be stable to ensure proper operation.

Symptoms:

The US homeowner reports a loud thumping sound originating from the Speed Queen washing machine, especially noticeable during heavy wash loads. The noise is often accompanied by excessive vibration.

Possible Causes:

Overloaded washer causing imbalance
Worn or damaged suspension rods
Weak or broken tub dampening straps
Damaged or loose drive pulley
Foreign object trapped between tubs
Unlevel washing machine

Solution:

1

Unplug the washing machine from the 120V AC outlet. Verify no power to the unit with a multimeter.
2

Remove the top panel (typically secured with screws at the rear) using a 1/4-inch nut driver.
3

Inspect the suspension rods for signs of wear, damage, or breakage. Replace if necessary.
4

Examine the tub dampening straps for cracks or breaks. Replace as needed.
5

Check the drive pulley for looseness or damage. Tighten the pulley nut with a wrench (size varies, typically 15/16-inch or 1-inch).
6

Manually rotate the inner tub to check for obstructions. Remove any foreign objects.
7

Use a level to ensure the washing machine is level. Adjust the leveling feet as needed.

Safety Warning:

Always disconnect power before servicing. High voltage components are present. Use proper Lock Out/Tag Out (LOTO) procedures to prevent accidental energization.

Prevention:

Avoid overloading the washing machine. Regularly inspect the suspension components and leveling feet. Clean the tub periodically to prevent build-up of detergent and debris.

Expert Tip:

Many Speed Queen washers have a diagnostic mode. Refer to the service manual (available online) to access error codes and perform component testing. Often pressing and holding START/PAUSE and then pressing POWER will initiate the diagnostic mode, but confirm for your specific model.

Frequently Asked Questions

•How do I access the diagnostic mode on my Speed Queen washer?

The procedure varies depending on the model. Consult the service manual for your specific model number. A common method is pressing and holding START/PAUSE while simultaneously pressing POWER. Some models require a sequence of button presses.

•Where can I find replacement suspension rods for my Speed Queen washer?

You can find replacement suspension rods at appliance parts retailers, both online and in local stores. Be sure to have your model number handy to ensure you order the correct parts.

•What is the proper leveling procedure for a Speed Queen washing machine?

Place a level on top of the washing machine. Adjust the leveling feet until the bubble is centered. Tighten the lock nuts on the leveling feet to secure them in place.

Speed Queen Washing Machine Loud Thumping Sound: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the diagnostic mode on my Speed Queen washer?

•Where can I find replacement suspension rods for my Speed Queen washer?

•What is the proper leveling procedure for a Speed Queen washing machine?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: