LG Ice Maker Making Knocking Noise: Step-by-Step Guide

If your LG ice maker is making knocking noises, it can mess up your kitchen vibe. To fix it:

Check if your fridge is sitting level.
Look for any twists or damage in the water supply line.
Swap out clogged water filters regularly.
Make sure ice buildup isn’t blocking the fan blades.
Inspect the motor and fan bearings for signs of wear.
Regular TLC can help prevent these issues. Remember to clean those condenser coils and switch out the water filter every six months!

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Written by: Mohammad Waseem

Updated on:

Ever been jolted awake by your LG ice maker’s noisy knocks? You’re not alone. This guide dives into why your ice maker sounds like it’s auditioning for a band and how to fix it. The kitchen’s the heart of the home, and no one wants a noisy ice maker ruining the peace.

From leveling your appliance to advanced troubleshooting, we’ve got your back. This isn’t just about stopping the noise; it’s about making sure your ice maker runs smoothly and quietly.

Did you know regular maintenance can help a lot? Yep, simple tasks like cleaning the condenser coils and replacing the water filter every six months can save you from future headaches.

Fast Fact: Did you know that regular maintenance and cleaning can significantly reduce the chances of your ice maker making strange noises? According to experts, simple acts like cleaning the condenser coils and replacing the water filter every six months can make a world of difference​​​​​​​​​​.

Key Takeaway

  1. Check for Water Line Woes: make sure the water supply line is not the culprit. Ensure it is securely connected to both the ice maker and the water source. Look for any leaks, kinks, or damage that might be hindering water flow and causing extra noise.
  2. Level Up Your Ice Maker: An unbalanced ice maker can vibrate excessively, leading to unwanted rackets. Grab a level and adjust the levelling feet on your ice maker until it sits perfectly flat. This simple fix can make a big difference in noise reduction.
  3. Tighten Things Up: screws and connections in your ice maker can loosen, creating rattling noises. Take a screwdriver and check all the components for tightness. Proper alignment minimizes those annoying clangs and bangs.
  4. Add Dampening Pads: If noise persists, consider adding vibration-dampening pads under your ice maker. These act as a noise barrier, absorbing vibrations and making your kitchen a calmer place.

Common Causes of Knocking Noise

Are you wondering why your LG ice maker is turning your peaceful kitchen into a percussion session? Let’s unravel this mystery together.

Knocking noises are not just a nuisance but also a red flag that something’s not quite right inside your machine.

Refrigerator Isn’t Level

Have you ever noticed how a slightly tilted washing machine turns laundry time into a loud, thumping concert?

Similarly, an unbalanced refrigerator can make your ice maker protest with loud knocks.

Check if your appliance is level; a simple adjustment might silence the noise.

Kinked Water Supply Line

image of Kinked Water Supply Line
image source: instructables.com

The pathway of water into your ice maker should be smooth and unobstructed.

Kinks or damage in the water supply line can create a symphony of sounds, with knocking being the main act.

Ensure the line is properly aligned and damage-free.

Ice Buildup is Causing Problems

Sometimes, the cold heart of your ice maker gets a bit too cold, leading to ice buildup.

This icy overcoat can interfere with the fan blades, turning their smooth rotation into a series of knocks.

Ice Maker Motor Issues

At the heart of your ice maker is a motor, that works tirelessly to keep your beverages chilled.

But when it wears out or gets jammed, it can start knocking, hinting that it might be time for a check-up or a curtain call.

Fan Bearings Are Damaged

Fan bearings are the unsung heroes, ensuring a breezy operation. But over time, they can wear out, leading to a fan that stutters and knocks instead of spinning smoothly.

Clogged Water Filter Causing Pressure Issues

image of Clogged Water Filter Causing Pressure Issues
image source: diy.stackexchange.com

A clean water filter is essential for smooth operation. But when it gets clogged, it can lead to pressure problems and, you guessed it, knocking noises.

  • Water Woes: Inconsistent water supply or pressure can not only affect ice production but also lead to knocking sounds, a sign to check your water inlet valve and filter.
  • The Cold Truth: An improperly functioning freezer or ice maker fan might not just freeze your ice but also your peace of mind with continuous knocking.

Did you know that a misaligned water supply line can not only cause noise but also lead to water leakage, potentially damaging your kitchen flooring? It’s not just about noise; it’s about nipping potential damage in the bud!

LG Ice Maker Making Knocking Noise: Step-by-Step Guide

Step 1: Check Refrigerator’s Leveling

A refrigerator that’s not properly levelled can lead to disturbance in the ice maker and cause knocking sounds.

Check the Level:

  • Use a spirit level to check the refrigerator’s alignment.
  • If it’s off, adjust the levelling feet underneath the unit.

Step 2: Inspect Water Supply Line

image of Inspecting Water Supply Line

An improperly connected or damaged water supply line can also be the culprit for those knocking sounds.

Examine the Connection:

  • Turn off the water source.
  • Ensure the line is correctly attached to your refrigerator.
  • Look for any cracks or damage. If present, replace the line with a new one.

Step 3: Change the Water Filter

image of Changing the Water Filter
image source: lg.com

A clogged or dirty water filter can lead to issues. Changing it might just do the trick.

Filter Replacement:

  • Locate the filter, usually behind the refrigerator.
  • Turn off the water supply before removing the old filter.
  • Install a new filter and turn the water supply back on.

Step 4: Inspect Ice Maker Motor

A faulty motor can be the reason behind the knocking noise.

Motor Inspection:

  • Access the motor in the freezer.
  • Check for any damage or broken parts.
  • If damaged, consider professional help.

Step 5: Replacing Worn-Out Fan Blades

Imbalanced airflow caused by damaged fan blades can result in knocking sounds.

Fan Blade Replacement:

  • Remove the back panel of your refrigerator.
  • Locate and inspect the fan.
  • If damaged, replace the fan blades.

Advanced Troubleshooting Techniques

Inspecting the Water Inlet Valve

A defective water inlet valve can cause a range of issues, including knocking noises.

Valve Assessment:

  • Shut off the water supply and disconnect the fridge.
  • Detach the valve, clean it to eliminate any blockage, and inspect for damage.
  • If defective, replace the valve and reattach all components.

Ice Maker Fan Malfunction

A malfunctioning ice maker fan might lead to improper ice formation and knocking noises.

Fan Inspection:

  • Place a magnet to simulate a closed door and check for cold air from the vents.
  • If the fan isn’t working correctly, consider replacing the part.

Control Board Issues

Problems with the control board can disrupt the ice maker’s functionality.

Control Board Check:

  • Ensure the control board is powering the ice maker.
  • Check for failed relays or issues with the ice level optical sensors.
  • If defective, replacing the control board might be necessary.

Dealing with Water Pressure Issues

image of Dealing with Water Pressure Issues
image source: lg.com

Improper water pressure can lead to leaking or noise.

Pressure Adjustment:

  • If you’ve changed the water filter and noticed leaking, adjust the water valve to manage the pressure.
  • Check for lodged ice cubes in the tray and clean any calcium buildup affecting the water fill mechanism.

Addressing Ice Maker Assembly Defects

A faulty ice maker assembly can halt ice production and cause noises.

Assembly Inspection:

  • Unplug the refrigerator and inspect the ice maker assembly for wear and tear, leaks, or other damage.
  • Ensure the water inlet valve is operational and free from debris.
  • Check for any loose or disconnected parts in the assembly.

Preventive Measures and Regular Maintenance

Regular Cleaning and Maintenance of the Refrigerator

Maintaining your LG refrigerator regularly is crucial for optimal performance and longevity.

Condenser Coil Cleaning:

  • Clean the condenser coil once or twice a year to prevent dust accumulation.
  • A clean coil ensures efficient operation and prevents overheating.

Door Gasket Inspection:

  • Regularly inspect the door gaskets for tightness and cleanliness.
  • A good seal prevents air leaks and maintains the refrigerator’s efficiency.

Dusting Off the Condenser Fan and Motor:

  • Dust accumulation can cause noise and reduce efficiency.
  • Keeping these components clean ensures smooth operation.

Levelling the Refrigerator:

  • An unsteady refrigerator can make unusual noises.
  • Ensure the levelling legs are stable and properly adjusted.

Water Filter Replacement

A clean water filter is essential for the ice maker’s performance and the quality of ice produced.

Routine Replacement:

  • Replace the water filter every six months to prevent sediment and debris buildup.
  • Regular replacement ensures a clean water supply and efficient ice production.

Using Genuine LG Filters:

  • Always opt for genuine LG water filters that fit your specific refrigerator model.
  • Genuine filters guarantee compatibility and optimal performance.

Checking for Leaks:

  • After replacement, check for any leaks and tighten loose connections.
  • This prevents water damage and ensures the ice maker operates correctly.

Efficient Refrigerator Operation

Ensuring your refrigerator runs efficiently can prevent many issues, including noises from the ice maker.

Optimal Temperature Settings

Set your freezer temperature to -2°F or -20°C for normal ice production.

Proper temperature settings ensure efficient operation and prevent overworking the components.

Avoid Overloading

Overloading the refrigerator can obstruct airflow and lead to uneven cooling.

Maintain proper space inside to allow for efficient air circulation.

Periodic Inspection

Regularly inspect your refrigerator for any signs of wear or malfunction.

Early detection of issues can prevent major breakdowns and extend the appliance’s life.

Conclusion: LG Ice Maker Making Knocking Noise

From my research, the journey to a noise-free ice maker involves simple checks and regular maintenance. Remember, a peaceful kitchen starts with a quiet LG ice maker.

From simple levelling to advanced troubleshooting, we’ve covered it all.

Remember, these appliances are intricate and sometimes, they just need a bit of TLC.

What stands out is the importance of regular maintenance.

A little bit of care can go a long way in preventing future issues and ensuring longevity.

While DIY solutions can be effective, there’s always comfort in knowing that professional assistance is just a call away.


How do I stop my ice maker from knocking?

To stop your ice maker from knocking, level your refrigerator, inspect and straighten the water supply line, change the water filter if it’s clogged, check the ice maker motor and fan blades, and ensure no ice buildup is obstructing the fan’s movement​​​​.

Why is my LG refrigerator making a knocking noise?

Your LG refrigerator may make a knocking noise due to an unbalanced appliance, a kinked water supply line, ice buildup causing obstruction, motor issues, or damaged fan bearings​​​​.

Why does my refrigerator make a knocking noise when making ice?

The knocking noise during ice-making can be due to ice buildup interfering with the fan blades, a faulty ice maker motor, or issues with the water inlet valve affecting the water flow​​​​.

Why does my LG ice maker make a squealing sound?

A squealing sound from an LG ice maker is often due to a malfunctioning fan motor or fan bearings that need replacement. It can also be a sign of a motor struggling due to ice buildup or obstructions​​.

How do I fix my freezer knocking noise?

Fix a freezer knocking noise by ensuring the appliance is level, checking for and removing any ice buildup around the evaporator fan, inspecting the fan motor and blades for damage, and verifying that the water supply line is not kinked or obstructed​​​​.

Is it normal for ice maker to make noise?

It’s normal for an ice maker to make some noise during operation, like a humming or buzzing when filling with water, or a clunking sound when ice is being ejected into the bin. However, excessive or unusual noises like knocking or squealing are not normal and often indicate an issue that needs attention​​​​.

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