Why Is My Dryer Making a Thumping Noise?

Q: Why is my dryer making a thumping noise during the cycle?

A: A thumping dryer is often caused by an uneven load, items balled up in the drum, or worn drum support parts like rollers or glides. In some cases, a flat-spotted roller, damaged belt, or object stuck in the drum path can create a repeating thump once per drum rotation. If the noise keeps happening with an empty or small load, it usually means a dryer part needs service.

Common Symptoms

• Rhythmic thump-thump sound while the drum turns
• Noise gets louder with heavier loads
• Thumping starts at the beginning of the cycle and may improve slightly
• Dryer still heats and runs, but sounds uneven
• Thumping with squealing, rattling, or scraping
• Drum feels rough or slightly uneven when turned by hand

Safety First

• Turn the dryer off and unplug it before checking the drum or vent area.
• Do not continue using the dryer if the thumping is loud or getting worse.
• Do not open internal panels or handle moving/electrical parts unless qualified.
• Stop using it immediately if you smell burning or hear grinding/metal scraping.

Quick Checks You Can Do (Easiest First)

1. Pause and redistribute the load: Heavy towels, blankets, and jeans can bunch together and cause temporary thumping.
2. Run a short test with an empty drum: If the thumping remains, it’s more likely a dryer component issue.
3. Check for shoes or bulky items: Single heavy items can tumble unevenly and create a repeated thump.
4. Turn the drum by hand (with power unplugged): Feel for rough spots, drag, or a repeating bump.
5. Inspect inside the drum for foreign objects: Small items can get caught and hit the drum path as it rotates.
6. Check the dryer leveling: A dryer that is not level can make load-related thumping worse.

Most Common Causes

Unbalanced or Bulky Load (Most Common)

Blankets, towels, and mixed heavy items can ball up and tumble unevenly, causing a rhythmic thumping noise that is not always a mechanical failure.

Worn Drum Support Rollers (Very Common)

As drum rollers wear, they can develop flat spots or rough bearings. This often creates a repeating thump or rumble as the drum rotates.

Worn Drum Glides / Slides

On some dryers, worn front glides can cause uneven support and noise that may sound like thumping, scraping, or rubbing.

Foreign Object in Drum Seal Area

Coins, buttons, small screws, or clothing hardware can get lodged near the drum seal and create a repeating tap or thump each rotation.

Belt Damage or Belt Seam Wear

A damaged or worn belt can create a repeated thump or flap-like noise, especially if the belt is fraying or misaligned.

Loose Drum Baffle (Lifter)

A loose baffle inside the drum can produce a repetitive thump as clothes tumble and the drum rotates.

Drum Support / Rear Bearing Wear (Model Dependent)

Some models use rear drum supports that can wear and create thumping, dragging, or rough rotation noises.

What Beacon Usually Checks

When our friendly technicians in yellow inspect a dryer making a thumping noise, we usually check:

• Whether the thump is load-related or present with an empty drum
• Drum rollers, glides, and support points for wear/flat spots
• Drum rotation feel and resistance (with power disconnected)
• Belt condition, tracking, and tension
• Drum baffles and internal fasteners for looseness
• Drum seal areas for foreign objects or wear marks
• Overall dryer operation after the noise source is corrected

When to Call Beacon

Call Beacon if the thumping happens every cycle, continues with an empty drum, or is getting louder. A repeating thump is often an early warning of worn support parts, and fixing it early can help prevent bigger dryer repairs.

Request Service
(352) 726-7530
www.BeaconSaves.com

Prevent This Next Time

• Avoid overloading and separate very heavy items when possible.
• Dry bulky items in balanced loads.
• Check pockets before washing and drying.
• Keep the dryer level to reduce extra vibration.
• Don’t ignore new noises that repeat from load to load.