Bosch Dishwasher Maintenance: How to Fix the E22 Error Code
Dishwasher Making Noise: Causes, Fixes, and When to Call a Pro
December 15, 2025
Dishwasher Repair
What You’ll Learn in This Guide
If your dishwasher is making unusual or loud noises, it’s often a sign that something inside the appliance isn’t working properly. Common causes include worn components, loose parts, or debris interfering with moving mechanisms. Understanding where the noise is coming from is the first step toward restoring quiet and efficient operation.
Why Is My Dishwasher Making Noise?
A dishwasher that produces grinding, rattling, humming, or clunking sounds during operation can quickly become frustrating. While some noises are normal, loud or persistent sounds usually point to a mechanical issue. Fortunately, many causes of a noisy dishwasher are identifiable and repairable with the right diagnosis.
Below are the most common reasons your dishwasher may be making noise.
Common Causes of a Noisy Dishwasher
1. Defective Pump Assembly
The pump is responsible for circulating and draining water. If it becomes worn or damaged, it may create loud grinding or whining noises. Since the pump contains several moving parts, any failure inside the assembly can affect overall performance and noise levels.
2. Spray Arm Seal or Bearing Issues
Spray arms rely on seals and bearing rings to rotate smoothly. If these components shift, wear out, or crack, the spray arm may wobble or scrape, producing noise during cycles. These parts are usually simple to inspect and replace.
3. Damaged or Loose Spray Arms
If spray arms are cracked, blocked, or striking dishes or racks, they can create knocking or clicking sounds. In many cases, replacing the spray arm resolves the issue immediately.
Additional Components That Can Cause Dishwasher Noise
Wash Impeller
A worn wash impeller may cause excessive vibration or grinding during water circulation.
Dish Rack Rollers
Broken or worn rollers can make loud sounds when sliding racks in and out.
Water Inlet Valve
A faulty inlet valve may cause buzzing or humming noises during water fill cycles.
Drive Belt (If Equipped)
Some models use a belt to drive components. A loose or damaged belt can cause squealing or thumping sounds.
Motor Bushings
Worn motor bushings can lead to loud operation and may require professional motor repair or replacement.
When to Call a Professional
If basic checks don’t eliminate the noise or if the dishwasher continues to run loudly, professional service is recommended. Internal components such as motors, pumps, and control systems require specialized tools and experience to repair safely.
Attempting to operate a dishwasher with unresolved noise issues can lead to more serious damage over time.
Reliable Dishwasher Noise Repair You Can Trust
At Dishwasher Installer, we specialize in diagnosing and fixing all causes of dishwasher noise. Our experienced technicians service all major brands and models, providing fast, reliable solutions that restore quiet performance and protect your appliance.
If your dishwasher is making noise, don’t ignore it—professional help can prevent costly repairs down the line.
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