My LG Refrigerator Is Making a Loud Noise

Quick answer

A loud LG refrigerator is often caused by a dirty condenser coil, a faulty fan motor, or a loose component. Turn off the fridge, clean the coils, and check for loose parts. If the noise continues, the compressor or fan motor may need replacement.

Confirm the symptom

• Loud buzzing, humming, or rattling from the back or bottom of the fridge
• Noise occurs continuously or when the fridge is running
• You can feel vibrations from the fridge while it's operating

Tools and prep

• Screwdriver set
• Infrared thermometer
• Shop vacuum or soft brush
• Multimeter
• Flashlight

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Prep & safety

• Unplug the refrigerator to ensure safety before starting any inspection or repair.
• Allow the fridge to cool down for at least 30 minutes before handling components.

Step-by-step troubleshooting

1. Check for Loose Components
   Do: Inspect the back and bottom of the fridge for loose screws or parts.
   Observe: Loose screws or vibrating components.
   Means: A loose part is causing the noise.
   Next: Tighten the screws or secure the component.
2. Clean Condenser Coils
   Do: Use a shop vacuum or soft brush to clean the condenser coils at the back or bottom of the fridge.
   Observe: Dust and debris on the coils.
   Means: Dirty coils can cause the compressor to work harder and make noise.
   Next: Plug in the fridge and monitor if the noise decreases.
3. Inspect Fan Motor
   Do: Locate the condenser fan motor (usually at the back or bottom) and check for damage or obstructions.
   Observe: A wobbling fan blade or unusual sound when spinning.
   Means: A faulty fan motor is causing the noise.
   Next: Test the fan motor with a multimeter for continuity.
4. Test Fan Motor Continuity
   Do: Use a multimeter to test the fan motor for continuity.
   Observe: No continuity or resistance outside the expected range.
   Means: The fan motor is faulty and needs replacement.
   Next: Replace the fan motor.
5. Check Compressor
   Do: Listen for a loud humming or buzzing noise coming from the compressor area.
   Observe: Loud noise when the compressor starts or runs.
   Means: The compressor may be failing.
   Next: Check the compressor's temperature with an infrared thermometer.
6. Test Compressor Temperature
   Do: Use an infrared thermometer to check the compressor's temperature while it's running.
   Observe: Abnormally high or inconsistent temperatures.
   Means: The compressor is working too hard or is failing.
   Next: Consider replacing the compressor if it's overheating.
7. Inspect Evaporator Fan
   Do: Open the freezer compartment and locate the evaporator fan. Check for ice buildup or obstructions.
   Observe: Ice buildup or a wobbling fan blade.
   Means: A frozen evaporator fan or obstruction is causing the noise.
   Next: Defrost the freezer and clean the fan if necessary.
8. Check Leveling Feet
   Do: Ensure the refrigerator is level by checking the leveling feet at the bottom.
   Observe: The fridge is not level or the feet are loose.
   Means: An unlevel fridge can cause vibrations and noise.
   Next: Adjust the leveling feet to stabilize the fridge.

Common causes

Parts you might need

When replacing parts, ensure compatibility with your LG refrigerator model.

• Condenser fan motor: match the model number and specifications printed on the old motor.
• Compressor: match the model and voltage requirements of your refrigerator.
• Evaporator fan: ensure the size and mounting holes match the original part.
• Leveling feet: match the size and thread type of the existing feet.

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Consult your refrigerator's manual or LG's website for the exact part numbers and specifications.

When to call a professional

• The noise persists after cleaning coils and checking components.
• You detect a burning smell or electrical issues.
• The compressor is overheating or making loud, unusual noises.
• You are unsure about testing electrical components safely.

FAQ