Symptoms
- Loud thump or bang timed with each drum turn
- Noise worse with shoes, sneakers, or bedding
- Drum feels like it drops slightly during rotation
- Rattling along with the thump
Likely causes
- CommonUnbalanced or bulky loadShoes, comforters, or a single heavy item shift and thump against the drum as it tumbles.
- CommonBroken or worn drum support rollerA cracked roller lets the drum drop slightly and bang on each rotation.
- PossibleBroken drum support bearing or slideThe rear bearing or front glide can wear out and let the drum shift out of position.
- PossibleLoose or broken drum baffle (lifter)The plastic fins inside the drum that tumble clothes can crack and bang loose.
- Less commonForeign object in the drum or blower housingA button, coin, or small item can get lodged and strike parts as the drum spins.
What to do
- Stop the dryer and check the load for a single bulky or heavy item causing imbalance.
- Run the dryer empty for a minute to see if the thump continues without any load.
- With the dryer unplugged, open the drum and inspect the baffles (lifters) for cracks or looseness.
- Check for anything unusual stuck between the drum and the front or rear panel.
- Rotate the drum by hand and feel for a section where it drops or catches, pointing to a roller or bearing issue.
- Tighten or replace a loose baffle if that's the cause.
- If the noise points to rollers or bearings inside the cabinet, have a technician replace the worn support parts.
Tools and parts
- Screwdriver
- Flashlight
Dryer drum baffleSearch: “dryer drum baffle lifter replacement”
Dryer drum rollerSearch: “dryer drum support roller”
When to call a pro
If the thump continues with an empty drum and no visible loose baffle, have an appliance technician inspect the rollers and rear bearing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.