This usually means something is stuck in the pump, a part is worn out, or your dishwasher is about to fail.
The good news? You can usually fix this yourself in under 30 minutes — no technician needed.
What Causes a Grinding Noise in a Dishwasher?
The grinding sound typically comes from the pump or motor area.
- Food debris stuck in the pump
- Broken glass or hard objects
- Worn-out pump impeller
- Faulty motor bearings
- Spray arm hitting something
In most US households, the #1 cause is debris in the pump.
Tools You May Need
- Screwdriver
- Gloves
- Flashlight
- Towel
Step-by-Step Fix
Step 1: Turn Off Power
Unplug the dishwasher or turn off the breaker for safety.
Step 2: Check the Bottom Filter
Remove the bottom rack and take out the filter. Look for food debris, glass, or plastic.
Step 3: Inspect the Pump Area
Use a flashlight to check inside. Remove anything stuck carefully.
Step 4: Spin the Spray Arm
Rotate it manually. If it hits something, that’s likely causing the grinding noispump
Step 5: Run a Test Cycle
Turn power back on and run a short cycle to check if the noise is gone.
If the Noise Still Continues
The issue may be internal parts:
- Pump Impeller (Cost: $20–$60)
- Motor Issue (Cost: $100–$250)
- Hidden debris in pump
Common Mistakes to Avoid
- Ignoring small grinding sounds
- Running dishwasher without checking
- Using too much detergent
- Not cleaning the filter regularly
How to Prevent This Problem
- Clean filter every 1–2 weeks
- Rinse heavy food off dishes
- Avoid putting bones or hard debris inside
When to Call a Professional
Call a technician if:
- Noise is very loud and constant
- Dishwasher stops mid-cycle
- You smell something burning
FAQ
Why is my dishwasher making a grinding noise?
Usually due to debris stuck in the pump or a worn-out impeller.
Is it safe to run a noisy dishwasher?
No. It can damage internal parts and increase repair costs.
How much does it cost to fix a noisy dishwasher in the US?
DIY: $0–$20 | Professional repair: $100–$250
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- Dishwasher leaving spots on dishes fix
Final Tip: Most grinding noise issues are small and easy to fix. Act early and you can save yourself hundreds of dollars.