Knocking Sound From Washing Machine

Introduction

A knocking sound from your washing machine can be alarming and usually indicates that something isn’t working correctly. This noise can range from a gentle thump to a loud, jarring bang, often occurring during the spin cycle or when the machine is filling with water. Ignoring this noise can lead to further damage, potentially shortening the lifespan of your washing machine and resulting in costly repairs. This guide will help you diagnose the cause of the knocking and provide simple solutions you can try yourself. Explore more in our Washing Machine Problems 4 collection.

Common Causes of Knocking Sound From Washing Machine

Here are some of the most common reasons why your washing machine might be making a knocking sound:. For more related activities, check out our Lg Top Load Washer Not Spinning.

• Unbalanced Load: Clothes clumped together on one side of the drum create an uneven weight distribution, causing the machine to shake and knock.
• Loose Objects: Coins, buttons, or other small items trapped inside the drum or between the inner and outer tubs can rattle and knock.
• Worn Drum Bearings: The bearings that support the drum can wear out over time, causing the drum to wobble and knock, especially during spin cycles.
• Weakened Suspension Rods: These rods help stabilize the drum. If they weaken or break, the drum can bounce around and knock.
• Damaged Drive Pulley: This connects the motor to the drum and can become loose or damaged, causing noise and vibration.
• Water Hammer: This occurs when the water supply valve suddenly closes, creating a shockwave in the pipes that can sound like a knocking noise.
• Foreign Object in Drain Pump: An object stuck in the drain pump area can rattle around when the pump is running.
• Shipping Bolts (If New): If you’ve recently purchased a new washing machine, remember to remove the shipping bolts designed to stabilize the drum during transport. Leaving them in will cause severe knocking.

Symptoms Checklist

Use this checklist to help pinpoint the cause of the knocking:

• Knocking occurs primarily during the spin cycle.
• Knocking is louder with heavier loads.
• The washing machine shakes violently during operation.
• The knocking sound changes or stops when the machine is empty.
• You can hear a metallic scraping sound along with the knocking.
• The washing machine is brand new.
• The knocking sound is present when the machine is filling with water.

How to Fix Knocking Sound From Washing Machine Step-by-Step Guide

Follow these steps to troubleshoot the knocking sound:

1. Unplug the Washing Machine: For safety, always disconnect the power cord before inspecting or working on your washing machine.
2. Check for Unbalanced Load: Open the washing machine and redistribute the clothes evenly around the drum. Make sure heavy items like towels or blankets are spread out.
3. Inspect the Drum for Loose Objects: Carefully examine the inside of the drum and the rubber seal for any trapped coins, buttons, or other small items.
4. Check the Shipping Bolts (If New): Locate the shipping bolts (usually at the back of the machine) and remove them according to the manufacturer’s instructions. Keep the bolts and washers in a safe place.
5. Level the Washing Machine: Use a level to check if the washing machine is sitting evenly on the floor. Adjust the leveling feet (usually located at the bottom corners) until the machine is level.
6. Check Water Supply Hoses: Make sure the water supply hoses are securely connected to the washing machine and the water supply valves. Tighten any loose connections.
7. Inspect Suspension Rods: If you are comfortable doing so (or have assistance), carefully tilt the machine back and inspect the suspension rods. Look for signs of damage, wear, or breakage.
8. Check the Drain Pump (with caution): Locate the drain pump access panel (usually at the front or bottom of the machine). Open the panel and carefully remove any debris from the pump filter. Be prepared for water to spill out.
9. Run a Test Cycle: After making adjustments or removing debris, run a short test cycle with an empty drum to see if the knocking sound has disappeared.
10. Listen for Water Hammer: If the knocking occurs only when the water valves shut off, a water hammer arrestor may need to be installed on the water supply lines. These can be purchased at most hardware stores.
11. Check the Drive Pulley: (If comfortable removing the back panel) After unplugging the washer, carefully inspect the drive pulley for looseness or damage.

Fix the Issue Without Buying Parts

Here are some free methods to try:

• Reset the Washing Machine: Unplug the washing machine for 1 minute. Plug it back in and run a test cycle.
• Clean the Washing Machine: Run an empty cycle with a washing machine cleaner to remove any buildup or residue that might be causing the noise.
• Check your user manual for a recalibration setting: Some newer models can automatically recalibrate to evenly distribute weight.
• Regularly clean the lint trap: Preventing build-up can help avoid related knocking issues.
• Avoid Overloading: Overloading puts extra strain on the machine and can contribute to knocking.

When Replacement Might Be Necessary

If the knocking persists after trying the above steps, it may indicate a more serious problem, such as worn-out drum bearings or a damaged motor. Replacement is sometimes the most cost-effective option. Discover more free resources across our collection library.

• Worn Drum Bearings: Replacing these can be expensive and complex, typically costing between $200 and $500 including labor.
• Damaged Suspension Rods: Replacement is simpler but still requires disassembly; parts are usually $50 to $150, plus labor if you hire a technician.
• Motor Failure: Depending on the model, motor replacement can cost $300 to $700, including labor.

Safety Warning

• Always unplug the washing machine before attempting any repairs or inspections.
• Avoid working on the washing machine if the floor is wet to prevent electric shock.
• Be careful when lifting or tilting the washing machine to avoid back injuries. Get assistance if needed.
• When removing debris from the drain pump, be prepared for water to spill out. Have a bucket and towels ready.

Tools You May Need

• Level
• Adjustable wrench
• Pliers
• Screwdrivers (Phillips and flathead)
• Bucket and towels
• Gloves

FAQ

Here are some frequently asked questions about knocking sounds from washing machines:

• Q: Why is my washing machine knocking only during the spin cycle?
  A: This is usually due to an unbalanced load or worn drum bearings.
• Q: Can I still use my washing machine if it’s making a knocking sound?
  A: It’s not recommended. Continuing to use the machine can worsen the problem and potentially cause further damage.
• Q: How do I know if the suspension rods are bad?
  A: Look for signs of damage, wear, or breakage on the rods. The drum may also bounce excessively during operation.
• Q: Is it safe to try and fix my washing machine myself?
  A: Yes, if you follow safety precautions and have basic DIY skills. If you’re uncomfortable with any of the steps, it’s best to call a qualified technician.
• Q: Why does my brand-new washing machine knock?
  A: Ensure shipping bolts have been removed.

Conclusion

A knocking sound from your washing machine can be a nuisance, but by following these troubleshooting steps, you can often identify and fix the problem yourself. Start with the simple solutions, like balancing the load and checking for loose objects. If the knocking persists, consider more advanced troubleshooting steps, but always prioritize safety. By taking a proactive approach, you can potentially save money on repair costs and extend the life of your washing machine. If you’re not comfortable tackling the problem yourself, don’t hesitate to call a qualified appliance repair technician. They’ll be able to diagnose and fix the issue, ensuring that your washing machine is back to running smoothly.

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