Dryer Making a Banging Noise When Running – What Causes It and What Part Fixes It?
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Understanding the Problem
A loud banging or thunking noise coming from a dryer during operation is usually mechanical and often indicates worn or broken drum support components, a loose blower wheel, a failing motor, or an object trapped between the drum and bulkhead. The sound often gets louder as the dryer spins and may change with load size or when the drum is spun by hand. Ignoring the noise can lead to further damage (broken drum, stripped bearings, motor stress) and ultimately a more expensive repair. Diagnosing the exact cause usually requires visual inspection and simple tests: open the dryer to check the drum support rollers, glides/pads, idler pulley, and blower wheel for wear or looseness; look for foreign objects inside the drum or blower housing; and spin the drum by hand to feel for roughness or grinding. Many of these parts are common wear items and relatively inexpensive to replace, but some situations (e.g., damaged motor or a broken drum) can require more labor and higher-cost parts.
Common Symptoms
Loud banging, thunking, or knocking during drum rotation; noise that changes with load size; visible wobble of the drum; intermittent or constant noise; possible burning smell if motor is being stressed.
Common Causes
- Worn or broken drum support rollers or bearings causing the drum to wobble and hit the housing
- Damaged or loose idler pulley, blower wheel, or motor mount striking the cabinet or blower housing
- Foreign object (coin, button, small item) trapped between drum and bulkhead or inside the blower housing
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
With the dryer unplugged, open the cabinet and manually spin the drum while listening and feeling: a rough or noisy rotation points to rollers/bearings or a damaged drum support; a loose wobble or knocking suggests a broken roller or missing support; a rattling from the rear near the blower housing usually indicates a loose/broken blower wheel or trapped debris.
Frequently Asked Questions
Can I keep using the dryer if it makes a banging noise?
It's not recommended. A banging noise usually means parts are wearing or misaligned; continuing to run the dryer can worsen damage (strip bearings, break the belt, damage the drum, or overwork the motor). Unplug the dryer and inspect for obvious foreign objects, then either replace the worn components or call a technician.
How do I find the right replacement part number for my dryer?
Locate the dryer model number (usually on the door frame, behind the door, or on the back panel). Use that model number on manufacturer or parts-supplier websites to find compatible parts. Many parts (rollers, belts, blower wheels) are model-specific, so cross-referencing with your exact model avoids ordering the wrong item.
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