Washing Machine Making A Knocking Noise

Introduction

A knocking noise coming from your washing machine can be alarming, and it’s a sign that something isn’t quite right. This noise usually indicates that there’s excessive movement or impact occurring inside the machine during operation. It’s important to address this issue quickly, as ignoring it can lead to further damage to your washing machine and potentially cause flooding or other hazards in your home. The knocking is often most noticeable during the spin cycle, but can also occur during the wash or rinse cycles. Ignoring it can lead to costly repairs later on, so let’s figure out what’s causing the noise!

Common Causes of washing machine making a knocking noise

Here are some of the most frequent culprits behind a washing machine making a knocking noise:

Unbalanced Load: This is the most common reason. Clothes bunched up on one side of the drum cause the machine to wobble and knock.
Loose Objects: Items like coins, buttons, or small toys trapped inside the drum or between the drum and outer tub can create a knocking sound.
Worn Drum Bearings: The bearings allow the drum to spin smoothly. If they’re worn, they can cause the drum to wobble and knock.
Damaged Suspension Rods: Suspension rods help to keep the drum stable. If they’re damaged, the drum can move excessively, leading to a knocking noise.
Loose Motor Pulley: The motor pulley connects the motor to the drum. If it’s loose, it can cause vibrations and knocking.
Foreign Object Stuck in the Pump: Small objects can sometimes get into the drain pump and cause a knocking or grinding sound.
Shipping Bolts Not Removed: If the machine is newly installed, check that the shipping bolts have been removed. They’re designed to stabilize the drum during transport and can cause serious damage if left in place.
Leveling Issues: An unlevel washing machine will vibrate and shake more, causing knocking sounds as it shifts during operation.

Symptoms Checklist

Use this checklist to help pinpoint the issue:

Knocking noise primarily during the spin cycle.
Knocking noise during the wash or rinse cycle.
Washing machine shaking or vibrating excessively.
Visible movement or wobble of the drum.
Metallic or grinding sounds accompanying the knocking.
Water leaking from the washing machine.
New washing machine installation.
The machine rocks when you gently push on the top corners.

How to Fix washing machine making a knocking noise Step-by-Step Guide

Follow these steps to troubleshoot the knocking noise:

Unplug the Washing Machine: Always disconnect the power before performing any maintenance or repairs.
Check for an Unbalanced Load: Open the washing machine and redistribute the clothes evenly around the drum.
Inspect for Loose Objects: Check the drum and the rubber seal around the opening for any loose items. Remove anything you find.
Run an Empty Cycle: Run the machine on a short, empty cycle to see if the noise persists without any clothes.
Check the Leveling Legs: Use a level to ensure the washing machine is sitting level on the floor. Adjust the leveling legs as needed.
Inspect the Suspension Rods (if accessible): Some models allow you to access the suspension rods from the top or back of the machine. Check if they are damaged or disconnected.
Check the Shipping Bolts (New Machines): If you recently installed the machine, make sure you removed the shipping bolts from the back.
Inspect the Motor Pulley (Advanced): If you’re comfortable, carefully inspect the motor pulley for looseness. This may require removing an access panel.
Check the Drain Pump Filter: Locate and clean the drain pump filter. Small objects trapped here can cause knocking sounds. Refer to your owner’s manual for location and instructions.
Listen Carefully: During a wash cycle, try to pinpoint exactly where the knocking sound is coming from. This will help you narrow down the source.
Reset the Machine: Sometimes a simple reset can resolve the issue. Unplug the machine for 5 minutes, then plug it back in.
Run a Calibration Cycle (if available): Some washing machines have a calibration cycle. Refer to your owner’s manual for instructions on how to run it.

Fix the Issue Without Buying Parts

Before resorting to replacements, try these free methods:

Reset the Machine: As mentioned, unplugging for 5 minutes can sometimes clear minor glitches.
Clean the Machine: Run a cleaning cycle with a washing machine cleaner to remove buildup and debris that could be contributing to the noise.
Recalibrate: If your machine has a calibration function, use it.
Inspect the Area: Check the floor beneath the machine. Is it solid and even? Sometimes a weak floor can amplify vibrations.
Basic Maintenance: Regularly clean the lint trap and wipe down the interior of the drum to prevent buildup.

When Replacement Might Be Necessary

If the knocking persists after trying these solutions, it may be due to a more serious issue, such as worn drum bearings or a damaged motor. These repairs can be costly, and in some cases, it might be more economical to replace the washing machine. Replacing bearings can cost between $200 and $500, while a new motor can range from $300 to $700. Other parts that commonly fail and might necessitate replacement include suspension rods and the drain pump.

Safety Warning

Always unplug the washing machine before attempting any repairs or inspections.
Avoid working on the machine while standing on a wet floor.
Be careful when lifting or moving the washing machine; it can be heavy. Get help if needed.
If you’re not comfortable performing any of these steps, consult a qualified appliance repair technician.

Tools You May Need

Level
Screwdrivers (Phillips and flathead)
Pliers
Wrench
Gloves
Flashlight

FAQ

Here are some frequently asked questions:

Q: Why is my washing machine knocking only during the spin cycle? A: This usually indicates an unbalanced load or worn suspension components that are more stressed during high-speed spinning.
Q: Can I still use my washing machine if it’s making a knocking noise? A: It’s not recommended, as continuing to use it could cause further damage.
Q: How do I know if the drum bearings are bad? A: If the drum wobbles excessively or makes a grinding noise, the bearings may be worn.
Q: What should I do if I can’t find the source of the knocking noise? A: It’s best to consult a qualified appliance repair technician.

Conclusion

A knocking washing machine can be a frustrating problem, but with a little troubleshooting, you can often identify and fix the issue yourself. Start with the simple solutions, like checking for unbalanced loads and loose objects. If the problem persists, consider more advanced checks. Don’t hesitate to contact a professional technician if you’re not comfortable performing the repairs yourself. Addressing the problem early can prevent further damage and save you money in the long run. Good luck!