Dishwasher Making Noise Not Functioning

Quick answer

Turn off the power and check for clogs in the drain pump or filter. If the motor hums but doesn’t run, the motor may need replacing. If unsure, call a professional.

Confirm the symptom

• Dishwasher makes loud noises when starting or running
• Dishes remain dirty and water doesn’t spray
• Unit does not complete cycles or shuts off abruptly
• You hear a humming sound but no motor action
• Water remains pooled at the bottom after a cycle

Tools and prep

• Screwdriver (flathead and Phillips)
• Flashlight
• Plunger or small plastic scraper
• Work gloves
• Bucket
• Turn off power at the circuit breaker
• Turn off water supply to the dishwasher

Step-by-step troubleshooting

1. Check Power Supply
   Do: Confirm the dishwasher is receiving power by checking the circuit breaker and outlet.
   Observe: Breaker is tripped or outlet has no power.
   Means: Electrical issue preventing operation.
   Next: Reset the breaker or check wiring if necessary.
2. Inspect the Door Latch
   Do: Ensure the door is fully closed and the latch engages properly.
   Observe: Door does not close or latch fails to lock.
   Means: Door switch issue preventing the dishwasher from starting.
   Next: Test the door switch with a multimeter if available.
3. Check for Clogs
   Do: Remove and clean the drain pump filter and inspect the drain hose for blockages.
   Observe: Debris or food particles clogging the filter or hose.
   Means: Clogs prevent proper drainage and cause noise.
   Next: Clear the clog and reassemble the parts.
4. Test Motor and Pump
   Do: Listen for a humming sound when the dishwasher is powered on.
   Observe: Motor hums but doesn’t run; no water circulation.
   Means: Faulty motor or pump.
   Next: Replace the motor or pump if confirmed defective.
5. Examine the Water Inlet Valve
   Do: Check if water is entering the dishwasher during the fill cycle.
   Observe: No water entering or low water pressure.
   Means: Clogged or faulty inlet valve.
   Next: Clean or replace the inlet valve.
6. Check the Float Switch
   Do: Ensure the float switch moves freely and isn’t stuck in the raised position.
   Means: Stuck float switch can prevent the dishwasher from filling or draining.
   Next: Clean or replace the float switch if necessary.
7. Test the Control Board
   Do: Look for visible damage or burn marks on the control board.
   Observe: Burned components or error codes on the display.
   Means: Faulty control board causing operational issues.
   Next: Replace the control board if damaged.
8. Inspect the Circulation Pump
   Do: Check for blockages or damage in the circulation pump.
   Observe: Debris or damage in the pump.
   Means: Clogged or faulty circulation pump.
   Next: Clean or replace the circulation pump.

Common causes

Parts matching

Common parts needed for a noisy, non-working dishwasher include:

• Drain pump filter
• Inlet valve
• Motor or pump assembly
• Float switch
• Door latch assembly
• Control board
• Circulation pump

Purchase OEM parts for compatibility and reliability, and always disconnect power before replacing components.

When to call a professional

• The dishwasher makes loud noises but doesn’t start or run after basic troubleshooting.
• You smell burning or see sparks when attempting to power on the unit.
• You suspect a faulty control board or electrical wiring issues.
• Replacing parts like the motor or pump doesn’t resolve the issue.
• You’re unsure about handling electrical components or complex repairs.

FAQ

Related guides

• dishwasher not draining properly
• dishwasher not heating water

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