Dryer Making Thumping Noise – Causes & How to Fix It

Dryer Making Thumping Noise – Causes & How to Fix It

A thumping or banging dryer is one of the most disruptive appliance problems — and one of the most fixable. At XPart Supply, we've helped thousands of Canadians diagnose and repair noisy dryers since 1996. This guide covers the most common causes of dryer thumping and how to fix each one.

Top Causes of a Thumping Dryer

1. Worn Drum Rollers (Most Common)

Drum rollers support the dryer drum and allow it to spin smoothly. When they wear flat or develop flat spots, the drum thumps rhythmically with every rotation — like a car tire with a flat spot. The thumping is usually consistent and gets worse over time.

Fix: Replace all drum rollers at the same time. For Whirlpool, Maytag, KitchenAid, Amana, and Kenmore dryers, the W11519506 Drum Roller Support Assembly is a common replacement.

2. Worn or Broken Drive Belt

A worn drive belt can develop a lump or splice point that causes a rhythmic thumping as it passes over the drum and pulleys.

Fix: Inspect the belt for wear, cracks, or a visible splice. Replace if damaged.

3. Worn Idler Pulley

A failing idler pulley can cause both squealing and thumping as the belt tension becomes uneven.

Fix: Replace the idler pulley assembly.

4. Items in the Drum

Shoes, zippers, buttons, or small items left in pockets can cause thumping or banging inside the drum. Always check before diagnosing a mechanical issue.

5. Drum Glides or Slides Worn Out

Front drum glides support the front of the drum. When they wear through, the drum can drop slightly and thump against the front bulkhead.

How to Diagnose the Thumping Noise

  • Rhythmic thumping that matches drum speed: Worn drum rollers or flat-spotted belt
  • Thumping only at startup: Belt splice or stiff roller bearing
  • Random banging: Items in the drum or loose drum baffle
  • Thumping with squealing: Idler pulley or drum rollers
  • Thumping gets worse over time: Drum rollers wearing further flat

DIY Repair Difficulty

  • Drum Roller Replacement: Intermediate – 45 to 75 minutes
  • Drive Belt Replacement: Intermediate – 45 to 60 minutes
  • Drum Glide Replacement: Intermediate – 60 to 90 minutes

Replacement Parts for a Thumping Dryer

Why Choose XPart Supply for Dryer Parts?

  • 🇨🇦 Canadian business serving customers since 1996 — 30 years of appliance parts expertise
  • Fast shipping across Canada with tracking on every order
  • Expert parts support — call or email us before you buy
  • Guaranteed fit or we'll make it right

Frequently Asked Questions

Q: Is a thumping dryer dangerous to use?
A: It's generally safe to use in the short term, but we recommend repairing it promptly. Worn drum rollers can eventually cause the drum to drop and damage the drum seal, heating element, or cabinet — turning a simple repair into a costly one.

Q: How much does it cost to fix a thumping dryer?
A: Drum rollers typically cost $15–$50 CAD each. Most dryers have 2–4 rollers. A full DIY roller replacement usually costs under $100 CAD in parts. A service call can cost $150–$300+ including labour.

Q: Do I need to replace all drum rollers at once?
A: Yes — we strongly recommend it. Rollers wear at similar rates, so replacing only the failed one often leads to another repair within months.

Q: What brands does XPart Supply carry dryer drum rollers for?
A: We carry drum rollers for Whirlpool, Maytag, Samsung, LG, GE, Kenmore, KitchenAid, Amana, Frigidaire, and more. Contact us with your model number for availability.