Dishwasher Making Noise When Water Circulates (Troubleshooting Guide)

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

A dishwasher making noise when water circulates is often due to a clogged filter, faulty pump, or loose components. Turn off power and water, check the filter, and inspect the pump for debris or damage.

Confirm the symptom

Noise occurs when water is circulating
Sound is loud or grinding
Happens during the wash or rinse cycle
Noise stops when water is off

Tools and prep

Screwdriver set
Plunger or soft brush
Replacement filter (if needed)
Work light
Protective gloves
Turn off power at circuit breaker
Turn off water supply

Step-by-step troubleshooting

Check the Filter
Do: Remove the dishwasher filter and inspect it for debris or blockages.
Observe: Filter is clogged with food particles or sediment.
Means: Clogged filter is causing restricted water flow and noise.
Next: Clean the filter thoroughly and reinstall it.
Inspect the Pump
Do: Locate the water pump and check for visible damage or debris.
Observe: Pump has foreign objects or signs of wear.
Means: A damaged or clogged pump can create loud noises during water circulation.
Next: Clean the pump or replace it if damaged.
Tighten Loose Components
Do: Check for loose parts such as the pump housing, hoses, or spray arms.
Observe: Parts are vibrating or rattling when water circulates.
Means: Loose components can cause abnormal noise due to vibration.
Next: Tighten all loose connections and parts.
Test the Water Inlet Valve
Do: Inspect the water inlet valve for mineral buildup or damage.
Observe: Valve is clogged or not closing properly.
Means: A faulty valve can cause water flow issues and noise.
Next: Clean the valve or replace it if necessary.
Check Water Pressure
Do: Verify if the water pressure is too high or low.
Observe: Water pressure is outside the recommended range.
Means: Incorrect water pressure can cause the pump to work harder, creating noise.
Next: Adjust the water pressure regulator if needed.
Examine the Pump Motor
Do: Listen for unusual sounds from the pump motor while running the dishwasher.
Observe: Motor makes grinding or whining noises.
Means: A failing motor may need to be replaced.
Next: Replace the pump motor if it is faulty.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Clogged Filter Debris restricts water flow, causing noise.	Common	Easy	Dishwasher Filter
Faulty Water Pump A damaged or worn pump creates loud noises during operation.	Common	Medium	Water Pump
Loose Components Vibrating parts can cause rattling or knocking sounds.	Sometimes	Easy	None
Clogged Water Inlet Valve Mineral buildup or debris prevents proper water flow.	Sometimes	Easy–Medium	Water Inlet Valve
High or Low Water Pressure Incorrect pressure forces the pump to work harder, causing noise.	Rare	Easy	Pressure Regulator
Failing Pump Motor Worn motor bearings or internal damage produce grinding or whining sounds.	Sometimes	Hard	Pump Motor

Parts matching

Common parts needed to fix a noisy dishwasher during water circulation include:

Dishwasher Filter
Water Pump
Water Inlet Valve
Pump Motor
Pressure Regulator

Purchase OEM parts or high-quality replacements for compatibility and performance.

When to call a professional

Noise persists after cleaning the filter and pump
You hear grinding or whining sounds from the motor
You are unsure about electrical components or motor replacement
Dishwasher leaks or doesn't clean dishes properly after repairs
You lack the tools or confidence to perform the repairs

FAQ

Why is my dishwasher making a loud noise when it's filling with water?

A loud noise during filling could be due to a clogged water inlet valve or high water pressure. Check the valve for debris and ensure the pressure is within the recommended range.

Can a clogged filter cause a dishwasher to make noise?

Yes, a clogged filter can restrict water flow, causing the pump to work harder and produce noise. Clean the filter regularly to prevent this issue.

How do I know if the water pump is faulty?

If the dishwasher makes loud or grinding noises during water circulation and cleaning performance is poor, the water pump may be faulty and need replacement.

Is it normal for a dishwasher to make some noise during operation?

Some noise is normal, but loud or unusual sounds indicate a problem. Regular maintenance can help minimize excessive noise.

Can I replace the water pump myself?

Replacing the water pump requires some technical skill and access to the pump. If you're unsure, it's best to consult a professional technician.