Causes of Knocking and Rattling Sounds in a Dryer

Knocking and Rattling Sounds in a Whirlpool Dryer:

Use the following tips to help prevent noises in your dryer:

Zippers, buckles, buttons and rivets on garments as well as loose coins, paper clips, pens, or similar items may be tumbling in the dryer. Always check and clear pockets prior to washing.
Items leaning against the dryer may also cause a knocking or rattling noises.
Remove objects from the top of the dryer that may be causing the sound.
Sometimes when the washer spins, it will cause the dryer cabinet to vibrate. Leave space between the washer and dryer to avoid this sound.
If the dryer is mounted on a dryer pedestal, items in the pedestal drawer may be rattling/vibrating causing the sound.