Washer-dryer combo is very noisy during spin; loud rumbling, roaring, or grinding from the drum area.

Safety first: Unplug the appliance. Spinning components can be dangerous; never reach inside a moving drum.

Step-by-step checks:

• Manual drum test: Spin the empty drum by hand. Listen for grinding or rumbling. Push up and down on the drum rim to feel for excessive play.
• Inspect pulley and bolt: Remove rear panel and check that the drum pulley bolt is tight and the pulley is not cracked.

When to replace: If bearings are noisy or there is significant play, the rear tub bearing and/or entire rear tub assembly must be replaced. This is a major repair often best handled by a professional.