Washing Machine Knocking On Spin Cycle

Introduction

That loud knocking or banging sound your washing machine makes during the spin cycle is a clear sign something isn’t right. It’s not just annoying; it can actually damage your machine over time and even cause vibrations that affect your home. This usually happens when the washing machine is trying to spin clothes at high speed, and something is causing an imbalance or obstruction. Addressing this knocking sound promptly can prevent more serious and costly repairs down the road. Let’s get started on figuring out what’s happening!

Common Causes of Washing Machine Knocking on Spin Cycle

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

• Unbalanced Load: The most common reason. Clothes clump together, creating an uneven weight distribution.
• Overloaded Washer: Too many clothes strain the machine and make it difficult to balance.
• Washer Not Level: If the machine isn’t sitting evenly on the floor, it will shake and knock during the spin.
• Loose Items: Coins, belts, or other objects stuck between the drum and the outer tub can cause a racket.
• Worn Suspension Rods/Springs: These parts help stabilize the drum; if they’re worn, the drum can bounce excessively.
• Damaged Drum Bearings: The bearings allow the drum to spin smoothly. When damaged, they can cause noise and vibration.
• Shipping Bolts Still Installed: If you’ve recently moved the machine, make sure the shipping bolts (used to stabilize the drum during transport) have been removed.
• Faulty Motor Coupling: Connects the motor to the transmission. Failure can result in loud noises.
• Drain Pump Issues: Objects lodged in the drain pump can cause vibration during the spin cycle.

Symptoms Checklist

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

• Loud knocking or banging noise during the spin cycle.
• Washer shaking or vibrating excessively.
• Clothes coming out soaking wet.
• The machine moves from its original position during the cycle.
• Error codes displayed on the washer’s control panel (refer to your owner’s manual).
• You hear the noise only when the washer is full of clothes.
• You see the washing machine wobbling on the floor.

How to Fix Washing Machine Knocking on Spin Cycle Step-by-Step Guide

Follow these steps to troubleshoot and fix your noisy washing machine:

1. Unplug the Washing Machine: Safety first! Disconnect the power cord from the outlet.
2. Check for an Unbalanced Load: Open the washer and redistribute the clothes evenly around the drum. Try removing some items if it seems overloaded.
3. Run a Test Spin with a Smaller Load: Put in just a few towels and see if the knocking persists. This will help determine if the issue is load-related.
4. Inspect the Machine’s Level: Use a level to check if the machine is sitting evenly. Adjust the leveling feet (usually located at the bottom corners of the machine) until it’s perfectly level. Tighten the lock nuts on the feet after adjusting.
5. Look for Obstructions: Check the drum and the rubber seal around the door for any loose objects like coins, buttons, or small clothing items.
6. Inspect the Drain Pump Filter: Locate the drain pump filter (usually at the bottom front of the machine, behind a small access panel). Remove the filter and clean out any debris.
7. Check for Shipping Bolts: If you’ve recently moved the washer, ensure the shipping bolts have been removed. These are typically located at the back of the machine. Consult your owner’s manual for instructions.
8. Visually Inspect Suspension Rods/Springs (If Accessible): If you can access the suspension rods or springs (you may need to remove the top or back panel of the washer – only do this if you feel comfortable and have the proper tools), look for signs of wear, damage, or breakage. Refer to your machine’s service manual for guidance.
9. Listen for Bearing Noise (Advanced): With the machine unplugged and empty, manually spin the drum. Listen for any grinding or scraping noises, which could indicate worn drum bearings.
10. Run a Calibration Cycle (If Applicable): Some washing machines have a calibration cycle that can help optimize performance and balance. Consult your owner’s manual for instructions.
11. Check Water Supply Hoses: Make sure the hoses are properly connected and are not hitting the machine cabinet during spin cycle.

Fix the Issue Without Buying Parts

Before considering replacements, try these free methods:

• Reset the Washer: Unplug the machine for 1-2 minutes and then plug it back in. This can sometimes resolve minor electronic glitches.
• Deep Clean the Washer: Run an empty cycle with a washing machine cleaner to remove buildup and residue that could be contributing to the imbalance.
• Maintain Proper Loading Habits: Avoid overloading the washer and distribute clothes evenly in the drum.
• Regular Inspection: Periodically check the leveling feet, drain pump filter, and for any loose objects in the drum.

When Replacement Might Be Necessary

If the knocking persists after trying the above steps, some parts might need replacing. Common culprits include worn suspension rods/springs (estimated cost: $50-$150 USD), damaged drum bearings (estimated cost: $100-$300 USD, often requires professional installation), or a faulty motor coupling (estimated cost: $30-$80 USD). However, weigh the cost of repair against the age of the machine; if it’s older than 8-10 years, replacement might be a more economical option. For more related activities, check out our Washing Machine Drum Making Loud Noise.

Safety Warning

• Always unplug the washing machine before attempting any repairs or inspections.
• Be careful when handling tools and working with electrical components.
• If you’re not comfortable performing any of these steps, consult a qualified appliance repair technician.
• Keep the area around the washing machine dry to prevent electric shock.

Tools You May Need

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

FAQ

Here are some frequently asked questions about knocking washing machines:

• Q: Why does my washer only knock during the spin cycle?
  A: The high speed of the spin cycle amplifies any imbalances or loose components, making the noise more noticeable.
• Q: Can I still use my washer if it’s knocking?
  A: It’s not recommended. Using a knocking washer can worsen the underlying problem and potentially cause more damage.
• Q: How do I know if the problem is the suspension rods?
  A: If you can manually push down on the drum and it bounces excessively or feels unstable, the suspension rods might be worn.
• Q: What if I can’t find the drain pump filter?
  A: Consult your owner’s manual for the exact location of the drain pump filter. It may be behind a different access panel or require a different removal procedure.
• Q: My washer is still knocking after trying everything. What should I do?
  A: It’s likely a more complex issue that requires professional diagnosis and repair. Contact 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 resolve the issue yourself. Remember to prioritize safety and consult your owner’s manual for specific instructions. If you’ve tried the steps outlined in this guide and the knocking persists, don’t hesitate to call a qualified appliance repair technician. It’s always best to address the problem before it leads to more significant and costly repairs.