Turn off power at the breaker for 1 minute, or press and hold the start/reset button for 3+ seconds.

Inspect the door gasket for cracks, tighten hose connections, and ensure the unit is level (adjust legs if wobbly).

Worn idler pulley, rollers, or drum support bearings are likely culprits. Lubricate rollers with dryer-safe grease or replace them if damaged.