Whirlpool Fridge Making Knocking Noise

Introduction

A knocking noise coming from your Whirlpool refrigerator can be unsettling and often indicates that something isn’t quite right. This noise, often described as a rhythmic tapping or banging, isn’t just annoying; it can signal a potential problem that, if left unaddressed, could lead to more significant issues and costly repairs down the line. Its common to hear this noise after moving the fridge, during the defrost cycle, or seemingly out of the blue. Don’t panic! Most knocking noises are fixable with a little troubleshooting. Let’s get started to identify and resolve the problem before it escalates.

Common Causes of Whirlpool Fridge Making Knocking Noise

Here are some of the most frequent culprits behind that knocking sound:

Ice Maker Issues: Ice buildup or jams in the ice maker can cause knocking as the mechanism tries to dispense ice.
Water Line Vibration: Loose or vibrating water lines connected to the fridge can create a knocking sound, especially when the ice maker is filling.
Condenser Fan Problems: A damaged or obstructed condenser fan, located near the compressor, can cause knocking as it struggles to spin.
Compressor Start Relay: The compressor start relay helps the compressor kick on. If it’s failing, it might create a knocking sound as it tries to engage.
Defrost System Issues: During the defrost cycle, melting ice can drip and cause knocking noises, particularly if the drain is clogged.
Expansion/Contraction of Components: The fridges internal components expand and contract with temperature changes. This can cause pops and knocks.
Loose Components: Sometimes, parts inside the fridge (shelves, drawers) can rattle or knock against each other.
Uneven Flooring: If the fridge isn’t level, the compressor might vibrate and cause a knocking noise.
The compressor itself: a failing compressor will make a rhythmic knocking noise and the fridge will not get cold

Symptoms Checklist

Use this checklist to help pinpoint the source of the noise:

Does the noise happen constantly, intermittently, or only during certain times (e.g., after the ice maker refills)?
Is the knocking sound coming from the back, bottom, top, or inside the fridge?
Does the knocking happen only during or after the defrost cycle?
Does the knocking increase or decrease in intensity?
Is the fridge still cooling properly?
Is the ice maker functioning as it should, or is it blocked?

How to Fix Whirlpool Fridge Making Knocking Noise Step-by-Step Guide

Unplug the Fridge: For safety, always unplug the refrigerator before starting any troubleshooting.
Level the Fridge: Use a level to check if the fridge is sitting evenly. Adjust the leveling feet (usually located at the bottom corners) until its stable.
Inspect the Ice Maker: Open the freezer and examine the ice maker. Look for ice buildup, jams, or foreign objects. Manually remove any obstructions.
Check the Water Line: Locate the water line connecting to the fridge. Make sure it’s securely connected and not vibrating against any surfaces. You can try adding foam padding or securing it with zip ties to dampen vibrations.
Clean the Condenser Coils: The condenser coils are usually located at the back or bottom of the fridge. Use a vacuum cleaner with a brush attachment to remove dust and debris.
Examine the Condenser Fan: Locate the condenser fan (usually near the compressor). Check for any obstructions (e.g., dust bunnies, debris) and make sure the fan blades are spinning freely. If they’re not, try manually spinning them to see if anything is blocking them.
Listen to the Compressor: Carefully listen to the compressor (the black, motor-like component at the back of the fridge). If the knocking noise seems to be coming from the compressor, it might indicate a more serious issue.
Inspect Interior Components: Check the shelves, drawers, and other removable components inside the fridge. Make sure they are properly seated and not rattling against each other.
Check the Defrost Drain: Locate the defrost drain (usually in the freezer compartment). If it’s clogged, melting ice can back up and cause knocking noises. Use a turkey baster or warm water to flush out the drain.
Run a Diagnostic Cycle (If Applicable): Some Whirlpool refrigerators have a built-in diagnostic cycle. Consult your owner’s manual to see if your model has this feature and how to run it.
Plug the Fridge Back In: After completing the above steps, plug the refrigerator back in and observe if the knocking noise has stopped.

Fix the Issue Without Buying Parts

Before considering replacing parts, try these free methods:

Reset the Fridge: Unplug the fridge for 30 minutes, then plug it back in. This can sometimes reset the system and resolve minor issues.
Deep Cleaning: Thoroughly clean the inside of the fridge, paying attention to areas around the ice maker and defrost drain.
Recalibration: Some refrigerators have a recalibration option in the settings. Consult your manual.
Regular Inspection: Keep an eye on the fridge’s performance and address any unusual noises or temperature fluctuations promptly.
Maintenance Basics: Regularly clean the condenser coils and ensure the fridge is level to prevent future problems.

When Replacement Might Be Necessary

If the knocking noise persists after trying all the troubleshooting steps, or if you suspect the compressor is failing, replacement of certain parts might be required.

Compressor: A failing compressor is a serious issue. Replacement typically costs between $300 and $700, including labor.
Condenser Fan Motor: Replacing the condenser fan motor usually costs between $80 and $200, including labor.
Ice Maker Assembly: Replacing the ice maker assembly can cost between $100 and $300, including labor.

It’s often wise to consult a qualified appliance repair technician for diagnosis and repair, especially for compressor issues.

Safety Warning

Always unplug the refrigerator from the power outlet before performing any troubleshooting or repairs.
Avoid working on electrical components with wet hands or on a wet floor.
If you are not comfortable working with electrical components, consult a qualified appliance repair technician.
Be careful when handling sharp objects or tools.

Tools You May Need

Screwdrivers (Phillips and flathead)
Adjustable wrench
Vacuum cleaner with brush attachment
Level
Turkey baster or warm water (for defrost drain)
Zip ties or foam padding (for water line)

FAQ

Q: Why is my fridge knocking after I moved it? A: Moving the fridge can dislodge components or cause the compressor to shift. Check if the fridge is level and inspect the back panel for any loose parts.
Q: My fridge is knocking only during the defrost cycle. Is this normal? A: Some knocking during the defrost cycle is normal due to melting ice. However, if the noise is excessive or persistent, check the defrost drain for clogs.
Q: How do I know if the compressor is failing? A: A failing compressor will make a rhythmic knocking noise, and the fridge won’t cool properly. The motor is also usually very hot to the touch.
Q: Can I fix a knocking fridge myself? A: Many common knocking issues can be resolved with simple troubleshooting steps. However, if the problem is complex or involves electrical components, it’s best to consult a professional.
Q: Is it safe to use the fridge if it’s making a knocking noise? A: It’s generally safe to use the fridge while it’s making a knocking noise, but it’s essential to address the problem promptly to prevent further damage.

Conclusion

Don’t let that knocking noise drive you crazy! By following these troubleshooting steps, you can often identify and fix the problem yourself, saving time and money. Remember to start with the simplest solutions first and work your way up. If you’ve tried everything and the knocking persists, it might be time to call in a professional. But give it a shot you might just surprise yourself!