Why Is My Washing Machine Making Knocking Noises And How To Silence It

A washing machine should be a quiet workhorse in the background of daily life—not a source of loud banging that echoes through your home. If yours has started making knocking noises during the spin cycle or at other stages, it’s not just annoying; it could signal an underlying mechanical issue. Left unattended, these sounds can lead to more serious damage, costly repairs, or even premature replacement. The good news is that most causes of knocking are diagnosable and fixable with basic tools and a bit of know-how. Understanding what’s causing the noise—and how to address it—can save time, money, and stress.

Common Causes of Washing Machine Knocking Noises

Knocking sounds in a washing machine typically occur during the spin cycle when the drum rotates at high speed. However, they may also appear during agitation or filling. Identifying the root cause is essential before attempting any repair. Below are the most frequent culprits:

• Unbalanced load: When laundry is clumped on one side of the drum, it creates uneven weight distribution, leading to violent shaking and knocking.
• Loose transit bolts: Machines shipped with bolts securing the drum. If not removed after installation, they can rattle violently during operation.
• Worn or damaged suspension rods: These support the drum and absorb shock. When worn, the drum shifts excessively, hitting the cabinet.
• Failing drum bearings: A grinding or knocking noise that increases with spin speed often points to degraded bearings.
• Foreign objects trapped in the drum: Coins, buttons, or small items can slip between the inner and outer tub, causing rhythmic thumping.
• Failed shock absorbers: Over time, shocks wear out and lose their damping ability, allowing the drum to slam against the frame.
• Uneven flooring or improper leveling: If the machine rocks or wobbles, it amplifies vibrations into audible knocks.

Tip: Always unplug the washing machine before inspecting internal components to avoid electrical hazards.

Step-by-Step Guide to Diagnose and Silence the Noise

Follow this systematic approach to identify and resolve the source of the knocking. This process avoids unnecessary part replacements and ensures safety.

1. Pause and Observe: Note when the noise occurs—during spin, fill, or agitation. Is it rhythmic or random? Does it worsen as spin speed increases?
2. Check Load Distribution: Redistribute bulky items like towels or jeans evenly. Run a test cycle with fewer clothes to see if the noise stops.
3. Inspect for Transit Bolts: Look at the back of the washer. Most front-loaders have 3–4 large bolts across the rear panel. If present, they must be removed and stored safely.
4. Level the Machine: Use a bubble level on top of the washer. Adjust the front feet by twisting them until the machine sits flat and stable. Rock the unit gently to confirm no movement.
5. Examine Shock Absorbers: Tilt the washer backward slightly (with help) to access the bottom. Inspect shocks for leaks, cracks, or disconnection. Push down on the drum—if it bounces excessively, shocks are likely failed.
6. Listen for Bearing Noise: With the washer off, spin the drum by hand. A gritty or rough feeling suggests bearing failure. During a spin cycle, listen for a low rumble escalating with speed.
7. Check for Foreign Objects: Remove the drain hose and filter (consult manual), then inspect the pump and drum seals for debris. Rotate the drum manually and feel for obstructions.
8. Inspect Suspension Rods: Located at the top or sides of the drum assembly, these rubber-coated rods dampen movement. Look for fraying, sagging, or detachment.

Do’s and Don’ts When Fixing a Noisy Washer

Do’s	Don’ts
Unplug the machine before inspection	Ignore persistent noises—early action prevents major damage
Use a level to ensure proper alignment	Overload the drum, especially with heavy items
Remove all transit bolts immediately after installation	Attempt complex internal repairs without experience
Replace worn shocks or suspension parts promptly	Run the machine on warped or soft flooring
Clean the pump filter monthly	Use excessive detergent, which can accelerate wear

Real-World Example: Sarah’s Front-Loader Fix

Sarah noticed her front-loading Samsung washer began thumping loudly during the final spin. Initially, she assumed it was due to an unbalanced load. After redistributing clothes multiple times with no improvement, she investigated further. Using a flashlight, she checked the rear of the machine and spotted two metal bolts still installed. She consulted the manual and realized these were transit bolts meant to be removed during setup. Once taken out with a socket wrench, the knocking vanished instantly. The machine ran smoothly thereafter. Sarah later admitted she’d moved the washer from a previous home and skipped rechecking the installation steps—a common oversight.

This case highlights how a simple, overlooked step can mimic serious mechanical failure. It also underscores the importance of reviewing manufacturer guidelines after relocation or servicing.

Expert Insight on Long-Term Washer Maintenance

“Many knocking issues stem from preventable oversights—like leaving transit bolts in place or failing to level the unit. Regular maintenance isn’t just about cleaning filters; it’s about ensuring structural integrity. Replacing worn shocks every 5–7 years can extend a washer’s life significantly.” — Mark Reynolds, Appliance Repair Technician with 18 years of field experience

Tips to Prevent Future Knocking Noises

Prevention is far easier than repair. Incorporate these habits into your routine to keep your washing machine operating quietly and efficiently:

Tip: Place anti-vibration pads under the feet of your washing machine to reduce noise transmission to floors and walls.

• Balance loads intentionally: Mix large and small items. Avoid washing single heavy blankets or rugs alone.
• Inspect monthly: Check hoses, filters, and visible components for signs of wear or leakage.
• Secure flooring: Install the washer on a solid surface. Avoid placing it on wooden platforms that flex.
• Use high-efficiency detergent: Reduces suds buildup, which can strain components over time.
• Leave the door ajar: After cycles, allow moisture to escape to prevent mold and seal degradation.

When to Call a Professional

Some issues require expert attention. If you’ve ruled out simple causes and the noise persists, consider professional help when:

• The drum feels loose or wobbly when spun by hand.
• You hear grinding or screeching alongside knocking—indicative of bearing or motor failure.
• Water leaks accompany the noise, suggesting internal seal damage.
• Shock absorbers or suspension rods need replacement—these often require partial disassembly.

Bearings, in particular, are sealed units embedded in the drum shaft. Replacement involves dismantling the entire cabinet and tub—often taking 3–5 hours. For many homeowners, this repair costs 50–70% of a new machine’s price. In such cases, upgrading to a newer, energy-efficient model may be more economical.

FAQ: Common Questions About Washing Machine Noises

Why does my washer knock only during the spin cycle?

Knocking during spin is usually due to imbalance, worn shocks, or failing suspension. At high speeds, minor misalignments become amplified. Start by leveling the machine and checking for transit bolts.

Can I still use my washer if it’s making knocking sounds?

Short-term use may be safe if the noise is mild and linked to load imbalance. However, persistent knocking stresses internal parts and risks catastrophic failure. It’s best to diagnose and fix the issue promptly.

How much does it cost to fix a knocking washing machine?

Simple fixes like removing transit bolts or leveling cost nothing. Replacing shocks averages $100–$200 in parts and labor. Full bearing replacement ranges from $300–$500, depending on model and labor rates.

Conclusion: Take Action Before the Noise Gets Worse

A knocking washing machine is more than a nuisance—it’s a warning sign. Whether the cause is something as simple as an unbalanced load or as serious as failing bearings, early intervention preserves both performance and longevity. By following the diagnostic steps outlined, applying preventive habits, and knowing when to call a technician, you can restore peace to your laundry room and extend the life of your appliance.

💬 Have you fixed a noisy washer yourself? Share your experience or questions in the comments—your insight could help others avoid costly mistakes!