Why Your Dishwasher Makes a High-Pitched Noise and How to Fix It

Ever wondered why your dishwasher suddenly sounds like a tiny alien invasion? Picture this: You’re enjoying a quiet evening at home, and then it starts – that high-pitched squeal piercing through the calm. Annoying, right? But fear not, we’ve got your back! In this article, we’ll unravel the mystery behind your dishwasher’s unwelcome serenade.

You’re not alone in this noisy ordeal. Many have faced the same screechy situation, left wondering what on earth is going on. But fret not, dear reader, for we’re here to shed light on the reasons behind this disruptive racket. Get ready to bid farewell to the ear-splitting clamor and say hello to peace and quiet in your kitchen once again.

Common Causes of Dishwasher High-Pitched Noise

Dishwasher high-pitched noise can be quite annoying, but fret not, as there are common reasons behind this issue that can be easily addressed. Here are some probable causes for the disruptive racket coming from your appliance:

  • Faulty Water Inlet Valve: When the water inlet valve is defective, it can lead to high-pitched screeching sounds during the dishwasher’s operation.
  • Worn Out Wash Arm Bearing Ring: Over time, the wash arm bearing ring can wear out, resulting in squealing or squeaking noises.
  • Defective Pump Housing: A malfunctioning pump housing can also be a culprit behind the high-pitched whining you hear.
  • Loose Spray Arm: If the spray arm is loose or damaged, it may produce whistling or screaming sounds as the dishwasher runs.
  • Clogged Water Inlet Filter: A blockage in the water inlet filter can cause the dishwasher to make unusual high-pitched noises during operation.

Understanding these common causes can help you diagnose and resolve the high-pitched noise emanating from your dishwasher, restoring peace and tranquility to your kitchen.

Loose or Faulty Door Seal

If your dishwasher’s emitting a high-pitched noise, a Loose or Faulty Door Seal could be the culprit. This seal creates a tight barrier between the door and the dishwasher frame, preventing water leaks and maintaining proper pressure levels during cycles. When this seal becomes loose or damaged, it can lead to air gaps and cause the machine to work harder, resulting in that unpleasant noise you’re hearing.

Click here to preview your posts with PRO themes ››

How to Check the Door Seal:

  • Inspect the seal for visible signs of wear, like cracks or tears.
  • Feel around the edges of the door for any gaps when it’s closed.
  • Ensure the seal is clean and free of debris that might be affecting its function.
  • If you notice issues with the seal, replace it promptly.
  • Consult your dishwasher manual or a professional technician for guidance on proper installation.
  • Regularly clean and maintain the seal to prevent future problems.

Remember, a well-sealed door not only reduces noise but also improves your dishwasher’s overall efficiency.

Malfunctioning Water Inlet Valve

If your dishwasher is emitting high-pitched noises, a malfunctioning water inlet valve could be the culprit. This valve is responsible for allowing water to flow into the dishwasher during cycles. When it malfunctions, it can create disturbances that manifest as those unwelcome sounds.

To identify if the water inlet valve is causing the issue, you can follow these steps:

  • Check for leaks: Inspect the area around the water inlet valve for any signs of leakage.
  • Listen for abnormal sounds: Pay attention to any hissing or screeching sounds coming from the valve.
  • Examine the valve for blockages: Debris or mineral buildup can impede the valve’s proper functioning.

If you detect any problems with the water inlet valve, it’s advisable to seek professional assistance for repairs or replacement. Ignoring this issue can lead to further damage and potentially impact the dishwasher’s overall performance. Regular maintenance and prompt action can help prevent disruptions and keep your appliance running smoothly.

Worn Out Spray Arm Bearing Ring

If your dishwasher is producing a high-pitched noise, a worn-out spray arm bearing ring could be the culprit. The spray arm bearing ring helps the spray arm rotate smoothly during the wash cycle. Here’s what you need to know about this issue:

  • Signs of Wear: Check for friction sounds or grinding noises while the dishwasher is in use. Visual inspection may reveal cracks or damage to the bearing ring.
  • Damage Consequences: A worn-out bearing ring can lead to the improper rotation of the spray arm, affecting cleaning performance and causing the high-pitched noise.
  • DIY Inspection: You can examine the spray arm bearing ring by removing the lower dish rack and locating the ring at the bottom of the dishwasher. Ensure the dishwasher is disconnected before attempting any inspection or repairs.
  • Replacement Steps: If you suspect the bearing ring is worn out, consider replacing it with a new one. You can purchase the replacement part from a local appliance store or online retailer.
  • Professional Assistance: If you’re unsure about replacing the bearing ring yourself, it’s advisable to seek help from a professional technician. They can diagnose the issue accurately and perform the replacement safely.

Click here to preview your posts with PRO themes ››

Remember, addressing issues like a worn-out spray arm bearing ring promptly can prevent further damage to your dishwasher and ensure it continues to operate efficiently.

Fixing the High-Pitched Noise Issue

So, you’ve identified that high-pitched noise coming from your dishwasher, and now you’re eager to resolve the issue. Here’s what you can do to fix that nuisance:

  • Check the Spray Arm: Over time, the spray arm can get clogged or damaged, causing that annoying noise. Ensure the spray arm moves freely and clean out any obstructions to see if that eliminates the sound.
  • Inspect the Bearings: The bearings in the dishwasher help various parts spin smoothly. If these are worn out or damaged, they can be the culprit behind the high-pitched noise. A replacement might be necessary in this case.
  • Examine the Water Inlet Valve: A faulty water inlet valve might also be contributing to the noise. Make sure it’s functioning correctly and consider replacing it if needed for a quieter wash cycle.
  • Tighten Loose Screws: Sometimes, all it takes is a loose screw to create an irritating sound. Check for any loose screws or other fasteners inside the dishwasher and tighten them to see if that resolves the issue.
  • Professional Help: If the noise persists and you’re unable to pinpoint the exact cause, don’t hesitate to call in a professional. They have the expertise to diagnose and fix the problem effectively.

Fix that high-pitched noise in your dishwasher by following these simple steps, ensuring a peaceful and quiet kitchen once again.


Now that you’ve learned about the possible causes of a high-pitched noise in your dishwasher, you can take action to resolve the issue. By following the steps outlined in this article, such as checking the spray arm, inspecting the bearings, examining the water inlet valve, and tightening loose screws, you can work towards restoring your dishwasher’s quiet operation. Remember, if the noise persists, it’s best to consult a professional for a thorough evaluation and solution. Taking care of your dishwasher will not only ensure a peaceful kitchen environment but also prolong its lifespan. Happy dishwashing!

Click here to preview your posts with PRO themes ››

Frequently Asked Questions

1. Why is my dishwasher making a high-pitched noise?

Dishwashers make high-pitched noises due to clogs or damage in the spray arm, wear in the bearings, faults in the water inlet valve, or loose screws.

2. How can I fix the high-pitched noise in my dishwasher?

Fix the high-pitched noise by checking the spray arm for clogs, inspecting bearings for wear, examining the water inlet valve for faults, and tightening any loose screws.

3. What should I do if the noise continues after troubleshooting?

If the noise persists, consider seeking professional help for an accurate diagnosis and an effective solution to restore a peaceful kitchen environment.

Charlie Thomson is Appliance Mastery's expert on laundry appliances. With a degree in mechanical engineering and over 8 years of experience in the appliance repair industry, Charlie is a go-to resource for homeowners who want to tackle common issues with their washing machines, dryers, and dishwashers.

Leave a Comment

Send this to a friend