If your dishwasher is making strange noises—such as grinding, buzzing, rattling, or humming—it’s usually a sign of mechanical wear, loose parts, or clogged components. While some sounds are normal, persistent or loud noises often mean there’s a failing motor, pump, or broken part. Addressing the issue early prevents costly breakdowns and water damage.

Why It Matters

Your dishwasher should run quietly in the background. When it starts producing unusual sounds, it’s not just an annoyance—it’s a red flag. Ignoring these noises can lead to:

• Costly repairs if small issues turn into motor or pump failure
• Higher water bills if leaks develop from damaged seals or hoses
• Complete breakdowns requiring emergency service or replacement
• Risk of water damage to floors and cabinets

In Raleigh, where many households rely on daily dishwasher use, addressing the issue quickly ensures your kitchen stays functional and avoids bigger repair bills.

Step-by-Step: Common Dishwasher Noises and Their Causes

Understanding the type of noise helps identify what’s wrong. Here’s a breakdown:

1. Grinding or Buzzing

• Possible causes: Foreign objects (like bones, glass, or seeds) stuck in the chopper blade or pump.
• When to worry: If the grinding continues after a cycle or worsens.
• Solution: A technician may need to remove debris or replace the chopper blade.

2. Humming or Low Buzz

• Possible causes: Normal sound of the motor running or water being forced through.
• When to worry: If the hum is loud, constant, and the dishwasher isn’t washing properly.
• Solution: This often indicates a failing motor or pump.

3. Rattling or Clanking

• Possible causes: Loose utensils, dishes not loaded correctly, or a spray arm hitting items.
• When to worry: If the sound persists after reloading.
• Solution: A pro may need to inspect spray arms or internal parts for looseness.

4. Squealing or Screeching

• Possible causes: Worn-out motor bearings or faulty pump seals.
• When to worry: If the squealing happens every cycle.
• Solution: Replacement of motor or pump assembly is likely.

5. Clicking or Popping

• Possible causes: Normal operation (control board relays, detergent dispenser opening).
• When to worry: If clicking is loud or happens constantly.
• Solution: Technician should check relays, door latch, and dispenser.

Fresh Stats: Dishwasher Usage & Repairs in 2025

• The average U.S. household runs a dishwasher 5 times per week (EnergyStar, 2025).
• 28% of dishwasher repairs in Raleigh are related to noise issues like pump or motor failure (internal service data, 2024).
• The average cost of ignoring a noise issue can rise from $200 for minor repairs to $600+ if motor or pump replacement is needed (HomeAdvisor, 2025).
• 70% of homeowners reported they waited too long before calling a repair tech, resulting in higher costs (Angi Survey, 2024).

These numbers highlight why acting quickly saves money and stress.

Summary

Strange dishwasher noises shouldn’t be ignored—they’re early warning signs of mechanical issues that can quickly escalate. Whether it’s grinding, squealing, or rattling, professional repair ensures your dishwasher runs smoothly, protects your home, and saves money long-term.

If your dishwasher is making unusual noises in Raleigh, call iFix Appliances today for fast, reliable repair. Don’t wait until a small sound turns into a costly breakdown.

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FAQs

1. Is it normal for dishwashers to make some noise?

Yes, dishwashers aren’t silent. A soft hum, swishing, or light clicking is normal. But loud grinding, squealing, or rattling is not and should be checked.

2. Can I keep using my dishwasher if it’s making strange noises?

It’s risky. Continued use could worsen the problem, damage parts, or cause leaks. It’s best to schedule an inspection if the noise doesn’t go away.

3. How do I know if I should call a pro in Raleigh?

If the noise is loud, repetitive, or your dishes aren’t coming out clean, it’s time to call a professional appliance repair service.

4. What’s the most common repair for noisy dishwashers?

In Raleigh, clogged pump assemblies, damaged spray arms, and failing motors are the most common causes of strange dishwasher noises.

5. How much does it cost to repair a noisy dishwasher?

Minor fixes can cost around $150–$250, while pump or motor replacements may run $400–$600. Timely repair keeps costs lower.