LG Refrigerator Motor Noise: How to Fix Noisy LG Refrigerators

Is your LG refrigerator motor noise driving you crazy? I’ve been there too. After countless sleepless nights, I decided to take action.

I researched extensively to find the root causes and solutions. Turns out, there are several reasons for that annoying hum or buzz. From faulty compressors to loose parts, the culprits vary.

But don’t worry, I’ve got you covered. In this guide, I’ll share practical tips to silence your fridge. You’ll learn quick fixes and when to call a pro.

Ready to reclaim your peace and quiet? Let’s dive in.

Key Takeaways:

• Research suggests motor noise in LG refrigerators often comes from normal operations like the compressor or fan, but can also indicate issues like improper leveling or frost buildup.
• It seems likely that noises like humming or buzzing are typical, while persistent loud noises may need professional attention.
• The evidence leans toward regular maintenance, such as cleaning coils and ensuring proper leveling, helping reduce noise.

What Causes Motor Noise in an LG Refrigerator?

Summary Table of Noise Causes and Actions

Noise Type	Cause	Normal/Abnormal	Action
Humming, Buzzing, Whizzing	Compressor operation	Normal	None, unless loud or lasts >1 hour; check leveling, clean coils
Popping, Tapping	Compressor starting, thermal expansion	Normal (30-90s)	None, repair if persistent and loud
Whirring, Humming	Fan motor operation	Normal	None, check for blockages if loud
Snapping, Cracking	Thermal expansion/contraction	Normal	None
Dripping, Hissing	Defrost cycle	Normal	None
Whooshing, Hissing	Air pressure changes from door opening	Normal	None
Loud Buzzing/Knocking	Compressor or fan motor issue, improper leveling	Abnormal	Level fridge, clean coils, contact LG support if persists
Excessive Vibration	Improper leveling, dirty coils	Abnormal	Adjust leveling, clean coils, ensure door alignment
Clicking/Tapping (persistent)	Evaporator motor or fan issue	Abnormal	Check fan, replace with 4681JB1029A if needed, contact professional

Abnormal Noises and Potential Issues

While many noises are normal, persistent or unusually loud sounds may indicate underlying problems. These include:

Compressor Issues:

Excessive humming or buzzing: If the compressor noise is loud enough to be heard from another room or lasts more than 1 hour, it may indicate a malfunction. LG Appliances Fix It suggests this could be due to a faulty compressor, requiring repair.

Buzzing, knocking, or banging: These can occur if the linear compressor is stuck in a speed adjustment cycle for too long, exceeding 1 hour, as per the same source. This may necessitate professional intervention.

Fan Motor Problems:

Evaporator Fan Motor: A loud hum or buzzing may indicate a broken fan blade or motor, while clicking or tapping could indicate a malfunctioning evaporator motor. Repair Clinic suggests checking if the fan blade turns freely and replacing it if necessary with part 4681JB1029A.

Condenser Fan Motor: If the fan blades are obstructed or not spinning freely, they can cause noise. LG Appliances Fix It recommends using a multimeter to check voltage and continuity and replacing them with part 4681JB1029B if they are faulty.

Improper Leveling:

If the refrigerator is not level, it can cause vibrations that amplify compressor or fan noise. Twin Appliances advises checking with a level tool or water glass and adjusting the legs, ensuring a slight backward tilt for proper door closure.

Dirty Condenser Coils:

Dirty coils can make the compressor work harder, increasing noise. LG Appliances Fix It recommends cleaning the coils every 6-12 months to ensure efficiency and reduce strain on the motor.

Frost Buildup:

Excessive frost around the evaporator fan can cause noise, often due to the temperature being set too low (below 37°F) or poor door sealing. Denver Appliance Repair Service suggests adjusting the temperature to 37°F-40°F and checking the door gasket for alignment.

Defrost System Issues:

A faulty defrost heating element or blocked drainpipe can lead to ice buildup, which may contact the fan and cause noise. Reddit users reported that improving airflow by rearranging freezer items resolved noise, suggesting defrost system involvement.

Water Line or Ice Maker Problems:

Dripping noises outside the refrigerator may indicate issues with the water line or ice maker, such as leaks, kinks, or clogs. LG Appliances Fix It advises turning off the water supply if needed, and contacting a professional for repairs.

How to Diagnose Motor Noise in an LG Refrigerator?

1. Check the Evaporator Fan Motor

To diagnose motor noise in your LG refrigerator, focus on the evaporator fan motor, which helps keep the fridge at the right temperature.

Here’s a quick guide:

Symptoms:

• Fridge running too warm
• Loud noise when running, which might be a sign to request a repair from LG USA support.

Tools:

• Phillips screwdriver
• Flathead screwdriver (big and small)

Replacement Part:

• LG Refrigerator Evaporator Fan Motor 4681JB1029A (replaces older parts like EAU60694507, 1330410, etc.)

Steps:

Step 1: Unplug the fridge or turn off the circuit breaker for safety.

Step 2: Open the freezer door and take out the shelves to reach the back panel.

Step 3: Remove the light lens and bulb.

Step 4: Unscrew and remove the duct at the top of the freezer.

Step 5: Access and replace the evaporator fan motor with the new one (4681JB1029A).

Step 6: Put everything back together in reverse order.

I’ve had to do this myself, and it’s pretty straightforward if you follow these steps!

2. Inspect the Condenser Fan Motor

If you wanna check the condenser fan motor in your LG fridge, here’s a quick guide:

1. First thing, unplug the fridge. Safety first!
2. Take off the rear access panel, it’s usually at the bottom back, near the compressor.
3. Look at the fan blades – make sure they’re not blocked and can spin easily. If they don’t spin well, the motor bearings might be worn out.
4. Use a multimeter to see if the motor’s getting the right voltage (it should say on the motor). If it’s getting power but not running, you probs need a new motor.
5. To dig deeper, disconnect the wires and check for continuity in the motor windings with the multimeter. No continuity means the motor’s shot.
6. If the motor’s fine but your fridge still ain’t cooling, other parts like the compressor, thermostat, or control board might be the issue.
7. If the motor’s busted, replace it with a compatible one, like the LG Electronics 4681JB1029B.

3. Examine the Compressor Motor

Checking the compressor motor in an LG fridge? Here’s what you do:

1. Unplug the fridge and take off the back panel to get to the compressor.
2. The compressor’s at the bottom rear, near the condenser fan motor.
3. Look at the compressor for any humming noise. See any oil leaks or burn marks? If it looks good, move on.
4. Disconnect the compressor connector by squeezing it and pulling down.
5. Grab a multimeter and measure resistance between the pins on the connector.
   • For bottom freezer models: it should be 11.5-13 ohms from common to power, and 16-18 ohms from common to save.
   • For side-by-side and multi-door models: it should be 6-8 ohms from common to power, and 10.5-12.5 ohms from common to save.
6. If the values are off or the compressor doesn’t run, check the overload protector (OLP) and positive temperature coefficient (PTC).
7. If the compressor’s bad, you’ll need a new one, like the LG Electronics 4681JB1029B. Check the repair guide for steps on replacing it.

How to Fix Motor Noise in an LG Refrigerator?

1. Clean the Condenser Coils

unplug your fridge and move it away from the wall. You’ll need to get to the back of it.

Find the condenser coils, usually at the bottom rear.

Grab a vacuum with a narrow attachment and suck up all the dust and debris you see on the coils.

Take a flexible brush and clean between the coils and corners to get rid of the stubborn dirt.

Vacuum again to remove the loosened dirt.

If the coils are still dirty, rinse them gently with cold water. Make sure they’re completely dry before you plug the fridge back in.

Put any panels or toe guards back in place and slide the fridge back to its spot.

Plug the fridge back in and check if it’s working properly.

Clean those coils every 6-12 months. It helps your fridge run better and last longer.

I find it pretty satisfying to see all the dust gone and knowing my fridge is gonna be more efficient!

2. Replace the Evaporator Fan Motor

To change the evaporator fan motor in an LG fridge, here’s what ya need to do:

1. Unplug the fridge – Safety first! Don’t skip this step.
2. Empty the freezer – Take out all the shelves. Clear space to work.
3. Remove the light lens – Push up the tab at the bottom, then lift it off.
4. Take out the light bulb – Unscrew it counterclockwise. Easy peasy.
5. Remove the top duct – There are screw covers and screws. Take ‘em all out.
6. Access the evaporator fan motor – Pull out the air duct to get to the motor.
7. Disconnect the wires – Find the evaporator fan motor, then unplug the wires.
8. Unscrew the motor – Take out the screws holding the motor and remove it.
9. Install the new motor – Put in the new fan motor (part #4681JB1029A), secure it with screws.
10. Reconnect everything – Plug the wires back into the new motor.
11. Reassemble everything – Put back the air duct, duct, light bulb, and light lens. Do it in reverse order.
12. Plug the fridge back in – Make sure it’s working fine.

3. Replace the Condenser Fan Motor

unplug your fridge and turn off the water supply. Safety is key!

Get Access to the Motor:

Take off the lower rear access panel by removing the screws holding it in place.

Use pliers and a flathead screwdriver to gently pull off the fan blades from the motor shaft.

Use a short Phillips head screwdriver to unscrew the motor mounting bracket.

Disconnect the motor’s wire harness and lift out the old motor. Easy peasy!

Install the New Motor:

1. Transfer the rubber mounts from the old motor to the new one.
2. Position the new motor in the bracket, reconnect the wire harness, and secure it with the screws.
3. Slide the fan blades back onto the motor shaft.
4. Reattach the access panel with the screws you removed earlier.
5. Reconnect the water supply line to the inlet valve and turn the water back on.
6. Plug your fridge back in and check to make sure everything’s running smoothly.

4. Replace the Compressor Motor 

1. Remove the lower rear access panel.
2. Cut the compressor tubing at the base with a tubing cutter or dikes.
3. Disconnect the compressor wires and take out the compressor.
4. Sand the joints on the new compressor for good solder adhesion.
5. Attach the compressor plug to the new compressor.
6. Position the new compressor and align the tubing.
7. Braze the joints with a torch and brazing rods. Pressurize the system with dry nitrogen to check for leaks.
8. Use the compressor to create a vacuum in the system.
9. Charge the system with the correct refrigerant.
10. Reconnect the water supply line and turn the water back on.
11. Plug the power cord back in and make sure the refrigerator is working properly.