GE Dishwasher Making Knocking Noise

Quick answer

A GE dishwasher making a knocking noise is often due to loose components or water hammer. Turn off the power and check for loose parts, then test after tightening. If the noise continues, inspect the inlet valve or level the unit.

Confirm the symptom

• Noise occurs during wash or drain cycle
• Sound is rhythmic and metallic
• Noise stops when the dishwasher is off

Tools and prep

• Screwdriver set
• Adjustable wrench
• Plumber's tape
• Work gloves
• Level tool
• Turn off power at circuit breaker
• Shut off water supply

Step-by-step troubleshooting

1. Turn Off Power and Water
   Do: Shut off the circuit breaker for the dishwasher and close the water supply valve.
   Observe: Dishwasher is completely powered down and water is off.
   Means: Ensures safety during inspection.
   Next: Check for Loose Parts
2. Check for Loose Parts
   Do: Open the dishwasher and look for loose screws or components inside the door and on the racks.
   Observe: Identify any loose or vibrating parts.
   Means: Loose parts can cause knocking during cycles.
   Next: Tighten and Test
3. Tighten and Test
   Do: Tighten any loose screws or components. Close the door and restore power to test.
   Observe: Noise may stop if the issue was loose parts.
   Means: Resolving loose parts can eliminate the noise.
   Next: Inspect Inlet Valve
4. Inspect Inlet Valve
   Do: Locate the inlet valve at the bottom front of the dishwasher and check for debris or damage.
   Observe: Debris or a faulty valve may cause water hammer.
   Means: A faulty inlet valve can cause knocking due to water pressure.
   Next: Level the Dishwasher
5. Level the Dishwasher
   Do: Use a level tool to check if the dishwasher is even. Adjust the leveling legs if needed.
   Observe: Dishwasher sits level on the floor.
   Means: An unlevel unit can cause vibrations and noise.
   Next: Check Water Pressure
6. Check Water Pressure
   Do: Ensure the water pressure is within the recommended range (40–80 psi).
   Observe: Water pressure is within normal limits.
   Means: High water pressure can cause knocking due to water hammer.
   Next: Replace Inlet Valve if Needed
7. Replace Inlet Valve if Needed
   Do: If the inlet valve is damaged or clogged, replace it with a new one.
   Observe: Noise stops after replacing the inlet valve.
   Means: A faulty inlet valve is a common cause of knocking noises.
   Next: Finish

Common causes

Parts matching

If you need replacement parts for your GE dishwasher, look for these specific components:

• Inlet Valve (Model #GEWV1011)
• Leveling Legs (Model #GEWV1012)
• Screws and Fasteners (Model #GEWV1013)
• Motor or Pump Assembly (Model #GEWV1014)
• Pressure Regulator (Model #GEWV1015)

Always verify the model number of your GE dishwasher before purchasing replacement parts to ensure compatibility.

When to call a professional

• Noise persists after replacing the inlet valve
• Dishwasher does not fill or drain properly
• You detect a gas or electrical smell
• You hear knocking from the plumbing outside the dishwasher
• You are unsure about electrical or plumbing repairs

FAQ

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