Sub-Zero Evaporator Fan or Loose Components

Loud rattling or knocking noise from inside the refrigerator compartment, especially when the fan runs.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Evaporator fan blade hitting ice, Loose fan shroud or screws, Broken fan blade, Ice buildup around fan housing

How to Fix / Troubleshooting

Safety first: Disconnect power before removing interior panels. Fan blades can cause injury.

Step 1 – Identify the noisy compartment

  • Open one door at a time and listen for changes in noise.
  • Press the door switch to keep the fan running while the door is open (if applicable).

Step 2 – Access evaporator fan

  • Remove shelves and the rear panel in the noisy compartment to expose the evaporator fan.

Step 3 – Inspect for ice and damage

  • Look for ice around the fan blade or housing; thaw any ice with warm air.
  • Check that the fan blade is not cracked or loose on the shaft; replace if damaged.
  • Tighten any loose mounting screws on the fan motor or shroud.

Step 4 – Reassemble and test

  • Reinstall the panel and shelves, restore power, and verify the noise is gone.
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Repair Difficulty

Medium 3/5

Required Part

Evaporator Fan Motor
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