Refrigerator Is Making Knocking Noise

5 Shocking Reasons: Refrigerator Is Making Knocking Noise [2023]

Are you hearing a strange knocking noise coming from your refrigerator? You’re not alone if you’re wondering why your refrigerator is making knocking noise. Don’t panic – we can fix this issue in no time.

The knocking noise of your refrigerator can be due to several factors. It could be as simple as the fridge’s components settling or as severe as a malfunctioning compressor. 

Maybe it’s the condenser fan hitting something, falling into the back of the fridge or the sound of refrigerant flowing through the lines. 

But don’t worry, you’re in the right place! In this blog post, we will explore the common causes of these mysterious knocking sounds and provide practical solutions to address them.

Whether it’s a minor issue you can fix yourself or a major one requiring professional attention, we’ve got you covered.

Why My Refrigerator Is Making Knocking Noise? 5 Reasons

Here, I’ll share five potential reasons why your refrigerator might be making knocking noises.

Faulty Compressor

The compressor is the heart of your refrigerator’s cooling system. It’s responsible for circulating refrigerant throughout the appliance. If it’s faulty or aging, it could be the source of the knocking sound you’re hearing. This usually happens when the compressor struggles to maintain the desired temperature inside the refrigerator.

Loose Parts

Loose parts can also cause a knocking noise. This could be anything from a loose fan blade hitting another part of the refrigerator to a screw or bolt that has come loose over time. Regular inspection and maintenance can help keep these sounds at bay.

Damaged Evaporator Fan Motor

The evaporator fan motor pulls air over the refrigerator’s evaporator coils. If this motor is damaged or malfunctioning, it can create a knocking or humming sound.

Defective Condenser Fan Motor

The condenser fan motor is located near the compressor and cools the refrigerant before entering the evaporator. It can cause a loud knocking sound when it’s not functioning properly.

Ice Maker Issues

If your refrigerator has an ice maker, problems with its functionality can lead to odd noises. For instance, if the ice maker tries to dispense ice but can’t due to a blockage, it may make a knocking sound.

I hope you found this information helpful. A knocking noise from your refrigerator is typically a sign of an underlying issue that needs attention.

An Ultimate Guide to Stop Your Refrigerator from Making Knocking Noises

In this easy-to-follow guide, I’ll walk you through the steps to identify and rectify the issue. So, let’s roll up our sleeves and get started!

Step 1: Identify the Source of the Noise

Firstly, we need to find out where the noise is coming from. It could be due to a few different parts:

Compressor: This is the heart of your refrigerator’s cooling system. If it’s faulty, it can cause a knocking sound.

Water Line: If your refrigerator has a water dispenser or ice maker, the water line could cause a noise if it’s not secured correctly.

Evaporator Fan: This fan circulates air over the evaporator coil. If it’s damaged, it can create a knocking sound.

Condenser Fan: This fan cools the refrigerant before entering the evaporator, which lies adjacent to the compressor. A faulty condenser fan can also cause a knocking sound.

Loose Objects: Loose screws or other parts can make a knocking noise.

Step 2: Inspect and Troubleshoot

Once you’ve identified the possible source, it’s time to inspect and troubleshoot. Here’s how:


If the compressor is the culprit, calling in a professional is best. Messing with the compressor can be dangerous if you need to know what you’re doing.

Water Line

Check the water line for any loose fittings or kinks. If the line isn’t secured properly, secure it with a zip tie or a similar fastener. If it’s kinked, you may need to replace it.

Evaporator Fan

Turn off the refrigerator and open the freezer. If the noise gets louder, the evaporator fan might be the problem. You’ll need to remove the back panel of the freezer to access the fan – check if it’s loose or if there’s any obstruction. If the fan blade is damaged, you’ll need to replace it.

Condenser Fan

Please turn off the refrigerator and unplug it. The condenser fan is usually located at the back. Check if any debris obstructs the fan or if the fan blades are loose or damaged. Clean the area and replace the fan if necessary.

Loose Objects

Check for any loose screws or parts in the refrigerator and tighten them.

Step 3: Seek Professional Help

If you’ve checked everything and the noise persists, it’s time to call in a professional. There might be a more serious underlying issue that needs expert attention.

This guide helps you restore peace in your kitchen. Dealing with a noisy refrigerator can be annoying, but it’s often something you can fix yourself.

Why Does My Whirlpool Refrigerator Make Knocking Noise?

Is your Whirlpool refrigerator making a knocking noise? This can be pretty unsettling, but don’t worry – I’ve got you covered. A knocking noise might indicate a few issues. 

It could be a fan blade hitting an ice build-up, which often happens when the defrost cycle isn’t working properly. In this case, you’ll notice frost accumulating in your freezer. 

Another potential culprit could be a loose compressor mount, which usually causes a rattling or knocking sound whenever your fridge starts or stops running. Or it could be a faulty defrost timer – if your fridge is knocking at regular intervals, this might be the issue. 

Each of these problems has unique symptoms that can help you identify the source of the noise. 

However, contact a professional repair service if you need help with the issue. They have the skills and knowledge to quickly return your fridge to its quiet self!

Read Also: 5 Weird Methods: How To Stop Refrigerator From Buzzing?

Why Does My Brand New Refrigerator Make Knocking Noise?

As a home appliance expert, I’ve encountered many cases of brand-new refrigerators making a knocking noise. It’s understandable to be concerned – new appliances should run smoothly. 

If your new refrigerator is making knocking sounds, it could be due to a loose part within the compressor or an imbalance in the fan blade.

It’s important to address these noisy fridge issues early on. If left unchecked, what starts as a minor annoyance can become a significant problem. “New refrigerator knocking” or “fridge knocking sound” are common complaints and often simple to resolve with the right help.

My top fridge troubleshooting tip would be contacting customer service for your brand. They’re equipped to guide you through the process and offer solutions tailored to your model. 

Why Does My Refrigerator Make A Knocking Sound When The Compressor Shuts Off?

Ever wondered why your refrigerator makes a knocking sound when the compressor shuts off? This common issue can often be attributed to a few key factors.

Firstly, a poorly balanced refrigeration system can cause the compressor to knock as it powers down. 

Secondly, obstructions in the airflow within the fridge, such as ice build-ups or food particles, can also lead to this knocking sound.

Compressor faults can also be caused by faulty components like the start relay, overload protector, or the compressor motor. If cleaning doesn’t resolve the issue, these components might need replacing.

If you need help with the problem or how to fix it, it’s always best to call an expert repair service. Stay vigilant, keep your fridge well-maintained, and don’t ignore unusual sounds.


In wrapping up, I hope you’re well aware of Why Your Refrigerator Is Making Knocking Noise. We’ve taken a journey to the heart of your refrigerator, exploring the mysterious knocking sounds and their most common triggers. 

We’ve covered everything from a poorly balanced refrigeration system to obstructions in the airflow and even faults in the compressor’s components. Ignoring these sounds might turn a minor issue into a refrigerator’s meltdown! 

Always remember timely maintenance and vigilance are the keys to your fridge’s longevity. We hope this guide leaves you feeling empowered to tackle these issues head-on. 

But if you’re ever in doubt, professional help is just a call away. Want more handy tips like these? Consider subscribing to our newsletter for more insights and solutions for your home appliances!


How can I fix the knocking noise in my refrigerator?

Fixing the knocking noise in your refrigerator typically involves identifying the noise source and addressing the underlying issue, such as clearing obstructions or replacing faulty components.

Why does my Whirlpool refrigerator make a knocking noise sometimes?

A Whirlpool refrigerator may make a knocking noise due to the compressor operating or the defrost timer switching on and off.

What causes a refrigerator knocking sound at night?

The refrigerator may create a knocking sound at night if the defrost cycle is activated, causing expansion and contraction of the unit’s parts.

Why does my refrigerator make a clunking noise when it shuts off?

A refrigerator can make a clunking noise when it shuts off due to the sudden stoppage of the motor, causing the components to move slightly.

My Frigidaire refrigerator is making a knocking noise. What should I do?

If your Frigidaire refrigerator is making a knocking noise, it may be due to a defective fan or compressor. It’s best to seek professional assistance.

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