Last Updated on October 5, 2026 by Umar Farooq
Two major manufacturers flatly disagree about whether a thumping dryer is a fault, and settling which one applies to yours is free. GE puts “a thumping sound” on its list of noises that are not normal. Whirlpool documents two thumps that are harmless — a load that balled itself up, and drum rollers that flattened while the dryer stood unused. Two observations tell you which fits.
The six-sound triage lives on dryer making loud noise, scraping metal on dryer making grinding noise. This page is the thump and the rattle.
The one sound GE will not call normal
GE publishes something no other manufacturer does: two lists, side by side, of expected and unexpected dryer noises. Normal gets two entries — “A squeak when the Dryer is started” and “The sound of the drum as it turns.” Thumping sits on the other: “Sounds That Are Not Normal. A thumping sound. A humming sound” (GE Appliances — Dryer, Noises).
GE then names a cause almost nothing else raises: “A frayed or damaged Dryer belt will make a thumping sound, which would require service.” The belt is a long thin loop wrapped right around the drum, so a frayed section strikes something once per revolution — exactly the rhythm people describe. GE’s escalation: “discontinue use of the Dryer until it has been checked.”
Whirlpool’s two harmless thumps, and when each applies
Whirlpool’s noise page documents thumping twice, and neither instance is a fault. The first is the load: “A form of thumping can occur when the load is twisted or balled up. Laundry items with large amounts of fabric, such as sheets, curtains, tablecloths, and bedspreads, can roll into a ball in the dryer” (Whirlpool — Sounds or Noises in a Dryer). Maytag adds the teenage-household version: “drying solid, firm items, like tennis shoes, can create a thumping noise” (Maytag).
The second thump arrives with conditions that do the diagnosis for you: “If the dryer hasn’t been used for a while, there may be a light thumping sound during the first few minutes of operation… the drum support rollers can flatten where the rollers and drum touch.” Note the two limits in Whirlpool’s own wording — light, and the first few minutes. A thump that is loud, or still there at minute twenty, has failed Whirlpool’s test for the benign version.
A dryer making thumping noise is not a dryer that rattles
The two words get used interchangeably, and they point at opposite ends of the machine. A thump is one heavy thing landing in time with the drum. A rattle is two loose things vibrating at a far faster tempo, and Whirlpool’s list of sources is almost entirely pockets: “Zippers, buckles, buttons, rivets on garments, loose coins, paper clips, pens, or similar items may be tumbling in the dryer.”
Maytag names the hiding place nobody thinks to open: “Remove the lint screen and inspect the lint chute for items like coins, buttons and even socks. These items can occasionally fall into the chute and hit the blower wheel.” The blower spins at motor speed rather than drum speed, which is why a coin down there clatters much faster than the drum turns. Three more sources sit outside the machine — things leaning on the cabinet, things loose in a pedestal drawer, and Whirlpool’s third: “when the washer spins, it will cause the dryer cabinet to vibrate.”
Whirlpool hosts recordings of both sounds
Here is the part no ranking page mentions, and it turns a guess into a comparison. Whirlpool’s noise page embeds audio: “Listen below to the noise of flattened rollers” under the disuse-thump explanation, and “Listen below to hear the sound of buckles or zippers in the dryer” under the rattle list. A manufacturer publishing audio of its own product misbehaving beats any written description of a sound, this one included.
Look at these before buying a roller kit
- Still thumping after twenty minutes. Outside Whirlpool’s “first few minutes” window.
- Once per revolution, and louder by the end of the cycle. Worsening under load is contact, not laundry.
- Any burning smell alongside it. Cut power at the breaker and stop (dryer burning smell).
- The noise changes when you press on the top panel. A cabinet or drum support has shifted.
Do not grease anything to quieten it. Whirlpool: “Do not use WD-40 to grease the parts of your dryer. This solution can pose a fire risk.”
FAQ
Is a thumping dryer dangerous?
It depends which thump. A balled duvet and a flat-spotted roller are harmless. GE’s position on an unexplained thump is to stop using the machine until a servicer sees it.
Why does my dryer thump only at the start of a cycle?
Whirlpool attributes a light thump in the first few minutes to drum support rollers that flattened where they touch the drum while the machine sat unused. They regain shape.
Can a broken belt make a thumping noise?
Yes: “A frayed or damaged Dryer belt will make a thumping sound, which would require service.” A fully broken belt is a different symptom — the drum stops turning altogether.
What is rattling in my dryer when the drum is empty?
Check the lint chute. Maytag describes coins, buttons and socks falling past the lint screen and striking the blower wheel. Then the pedestal drawer.
Count the thumps against one turn of the drum
One thump per revolution means something is riding on the drum: a shoe, a buckle, a balled sheet, a flat spot on a roller. A faster clatter that ignores the drum is hardware loose in the chute or blower. When that one-per-turn rhythm survives an empty drum and a new set of supports, the drum has worn out of round at its bearing seat, and the drum assembly itself is what gets replaced.
When the thump is loud, persistent and worsening within one cycle, stop. GE has it on the abnormal list, GE names a frayed belt, and a belt that fails completely takes the drum with it.
