Whirlpool Refrigerator Making Knocking Noise

Quick answer

A Whirlpool refrigerator making a knocking noise is often due to a loose component or condenser fan issue. Turn off the power, check for loose parts, and ensure the fan spins freely. If the noise persists, replace the fan motor or consult a technician.

Confirm the symptom

• Knocking or thumping sound from the back or bottom of the fridge
• Noise occurs intermittently or when the compressor cycles
• No visible ice buildup or frost in the freezer

Tools and prep

• Screwdriver set (Phillips and flathead)
• Flashlight
• Work gloves
• Level
• Owner's manual for your Whirlpool model
• Turn off the refrigerator at the circuit breaker before inspecting internal components

Step-by-step troubleshooting

1. Step 1: Locate the Noise Source
   Do: Listen closely to determine if the noise comes from the back, bottom, or inside the fridge/freezer.
   Observe: Identify if the noise is rhythmic, intermittent, or happens during specific cycles.
   Means: This helps narrow down the affected component.
   Next: Step 2
2. Step 2: Check for Loose Parts
   Do: Inspect the back panel, condenser coils, and fan for loose screws or vibrating components.
   Observe: Look for any parts that wiggle or rattle when touched.
   Means: Loose hardware can cause knocking sounds when the compressor vibrates.
   Next: Step 3
3. Step 3: Test the Condenser Fan
   Do: Unplug the fridge, locate the condenser fan (usually at the back or bottom), and manually spin the blades.
   Observe: Check for smooth rotation or resistance.
   Means: A seized or unbalanced fan can create knocking noises.
   Next: Step 4
4. Step 4: Inspect the Compressor
   Do: Look at the compressor (usually at the back bottom) for loose mounting bolts or signs of wear.
   Observe: Check if the compressor is vibrating excessively or making rhythmic thumps.
   Means: A loose or failing compressor can cause knocking during operation.
   Next: Step 5
5. Step 5: Level the Refrigerator
   Do: Use a level to check if the fridge is sitting evenly on the floor.
   Observe: Uneven leveling can cause the unit to vibrate and knock.
   Means: Adjust the leveling feet to stabilize the appliance.
   Next: Step 6
6. Step 6: Monitor After Fixes
   Do: Plug in the fridge and let it run for a few hours.
   Observe: Listen for the return of the knocking noise.
   Means: If the noise stops, the issue was likely loose parts or leveling.
   Next: Finish

Common causes

Parts matching

If you need to replace a part, match these descriptions to your Whirlpool model:

• Condenser fan motor: Usually located at the back or bottom of the fridge; may have a plastic housing and electrical connector.
• Leveling feet: Adjustable screws at the bottom corners of the unit.
• Compressor: Large, metal component at the back bottom with electrical and refrigerant lines connected.
• Shock absorber kit: Rubber or spring-based components under the fridge base.
• Evaporator fan motor: Located inside the freezer compartment, often behind a panel.

Check your model number online to find exact replacement parts for your Whirlpool refrigerator.

When to call a professional

• The knocking noise continues after checking all loose parts and leveling the fridge.
• You suspect the compressor is failing (this requires professional diagnosis and replacement).
• You are unsure about handling electrical components or refrigerant systems.
• The noise is accompanied by other issues like poor cooling or error codes.

FAQ

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