Why Is My LG Dishwasher Squealing: Troubleshooting and Solutions

If you’ve ever experienced a high-pitched squealing noise coming from your LG dishwasher, you’re not alone. A squealing dishwasher can be quite annoying and concerning. However, understanding the root causes behind this issue can help you troubleshoot and resolve it effectively. In this article, we’ll delve into the various reasons why your LG dishwasher might be squealing and provide practical solutions to silence the unwelcome noise.

Common Reasons for Dishwasher Squealing

Motor Issues

The dishwasher’s motor plays a crucial role in the cleaning process. If the motor is malfunctioning or damaged, it can result in a squealing noise. Common motor-related culprits include a worn-out motor belt or damaged motor bearings.

Defective Pump

The dishwasher pump is responsible for draining water and ensuring proper circulation. A defective pump, often due to debris blockage or impeller damage, can lead to squealing noises during operation.

Faulty Bearings

Bearings within the dishwasher’s motor assembly can wear out over time, leading to friction and squealing sounds. Lubrication problems or excessive wear and tear can contribute to this issue.

Assessing the Motor Issues

Worn-out Motor Belt

A worn or misaligned motor belt can cause the motor to function unevenly, resulting in squealing sounds. Inspecting the belt for signs of wear and adjusting its alignment can resolve this issue.

Damaged Motor Bearings

Motor bearings facilitate smooth motor operation. If they’re damaged or worn down, friction increases, leading to squealing. Replacing the bearings can restore normal operation and eliminate the noise.

Diagnosing a Defective Pump

Debris Blockage

Debris such as broken glass or food particles can clog the dishwasher’s pump, causing it to work harder and produce a squealing noise. Regularly cleaning the pump and its components can prevent this issue.

Impeller Damage

The impeller, responsible for moving water through the pump, can get damaged or blocked. This disruption in water flow can lead to squealing. Cleaning or replacing the impeller can rectify the problem.

Addressing Faulty Bearings

Lubrication Problems

Lack of proper lubrication in the motor bearings can result in friction and, subsequently, a squealing sound. Applying the appropriate lubricant can reduce friction and silence the noise.

Wear and Tear

Over time, bearings naturally wear out. If you notice a squealing noise accompanied by reduced performance, worn-out bearings might be the cause. Replacing them can restore the dishwasher’s smooth operation.

Maintenance Tips to Prevent Squealing

Regular Cleaning

Routine maintenance, such as cleaning filters, checking for debris, and cleaning the pump, can prevent issues that lead to squealing. A clean dishwasher is less likely to develop operational problems.

Optimal Loading

Properly loading the dishwasher ensures that spray arms can move freely without obstruction. Overloading can strain the motor and pump, potentially causing squealing noises.

DIY Repair vs. Professional Help

When to DIY

Simple issues like debris removal or minor adjustments can be tackled as DIY projects. Always refer to the user manual and exercise caution when working with dishwasher components.

When to Call a Technician

Complex issues such as motor or pump replacements are best left to professionals. Hiring a skilled technician ensures proper diagnosis and safe resolution of intricate problems.

Steps to Silence the Squeal

Gather Necessary Tools

Before attempting any repair, gather the required tools, such as screwdrivers, pliers, and lubricant.

Access the Motor Area

Carefully disassemble the dishwasher to access the motor and other internal components.

Replace Damaged Parts

If you’ve identified the source of the squealing, replace damaged parts like belts, bearings, or impellers.


A squealing LG dishwasher can disrupt your kitchen routine and indicate underlying issues. By understanding the potential causes and solutions outlined in this article, you can confidently troubleshoot and address the squealing noise. Regular maintenance and prompt repairs are key to ensuring your dishwasher operates smoothly and quietly.


  1. Q: Can I continue using my squealing dishwasher?
    • A: While it’s not recommended, minor squealing might not cause immediate harm. However, addressing the issue promptly can prevent further damage.
  2. Q: How often should I clean the dishwasher pump?
    • A: Aim for at least once a month to ensure proper pump function and prevent blockages.
  3. Q: Is lubricating the bearings difficult?
    • A: Not at all. Follow the manufacturer’s guidelines and use the recommended lubricant for a simple solution.
  4. Q: Can overloading the dishwasher lead to squealing?
    • A: Yes, overloading strains the dishwasher’s components, potentially causing squealing and other issues.
  5. Q: What if I can’t identify the source of the squealing?
    • A: If you’re unsure, it’s best to call a professional technician to diagnose and resolve the problem effectively.
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