If your washing machine is making unusual knocking or banging noises—but only during specific cycles—this is more than just an annoyance. While many homeowners assume that odd sounds are a normal part of wear and tear, selective knocking often signals a hidden problem that could worsen over time. Understanding the root cause is crucial to preventing further damage and costly repairs.

Why Washers Knock on Certain Cycles

Modern washers have multiple cycle options: delicate, normal, heavy, spin-only, and more. If the knocking only occurs during one or two of these cycles, it’s likely tied to the mechanical processes unique to those settings. For example, heavy-duty cycles use higher spin speeds, which put more stress on the drum, suspension, and drive system. If these components are slightly worn or misaligned, the result is a distinctive knocking sound.

Common Causes of Cycle-Specific Knocking

1. Unbalanced Drum
   A drum that is slightly off-balance will generally only make noise when spinning at higher speeds or when heavily loaded. This may be due to unevenly distributed laundry or a misaligned drum bearing. While it may not prevent the washer from functioning, repeated stress can lead to bearing failure.
2. Worn Drum Bearings or Suspension
   The drum is supported by bearings and suspension springs or dampers. Over time, these components can wear unevenly. Bearings, for instance, often cause a rhythmic knocking when spinning at certain speeds. A worn suspension can cause the drum to hit the washer’s frame only under specific load conditions.
3. Foreign Objects
   Small items such as coins, hairpins, or buttons can become trapped in the drum or between the drum and the tub. They often remain unnoticed during short or gentle cycles but will make noise during more vigorous or high-speed spins.
4. Faulty Drive Components
   The drive pulley, motor coupler, or belt can also create knocking noises, particularly when engaging higher-powered cycles. Worn belts may slip, or misaligned pulleys can strike against other components intermittently.
5. Loose Internal Parts
   Sometimes internal parts like the detergent drawer, filter, or mounting bolts loosen over time. Certain cycles that use more agitation or higher spin speeds can amplify these vibrations into audible knocking.

Why You Shouldn’t Ignore It

Even if the washer continues to function, ignoring unusual knocking can lead to serious consequences:

• Drum Damage: Persistent knocking can warp or crack the drum.
• Bearing Failure: Once bearings fail, they can seize and cause complete machine breakdown.
• Motor Stress: Misalignment and vibration put extra strain on the motor, shortening its lifespan.
• Leaks and Flooding: In some cases, knocking can dislodge seals, leading to water leaks.

Early detection is the key. A small knock today can become a full-blown repair tomorrow, often costing significantly more than a professional inspection and preventive maintenance.

What You Can Do

• Check for Unbalanced Loads: Make sure laundry is evenly distributed.
• Inspect for Foreign Objects: Look in the drum, filter, and detergent drawer.
• Avoid Overloading: Excessive loads increase stress on internal components.
• Observe Patterns: Note which cycles cause noise and under what conditions—this helps technicians diagnose the problem faster.

However, some issues—like worn bearings, suspension damage, or internal alignment problems—require professional attention. DIY repairs for these components are risky and could void warranties or cause further damage.

Professional Help Is the Safest Option

If your washer makes knocking sounds only on certain cycles, a professional inspection is the most reliable solution. Experienced technicians can identify the precise cause, perform repairs safely, and restore your machine’s performance.

Chula Vista Appliance Repair Company specializes in diagnosing and repairing all major washer brands. With skilled technicians and prompt service, they ensure your washer runs smoothly and quietly, prolonging its lifespan and protecting your investment.

Don’t wait until the knocking turns into a full breakdown. Schedule a professional service today to prevent costly repairs and ensure your laundry routine remains hassle-free.

Contact us

(619) 880-5508