When a garbage disposal motor spins normally but fails to grind or chop food waste, it is typically caused by dull or worn-out impellers (lugs) that fail to fling food against the shredder ring, a severe obstruction wedged between the flywheel and shredder ring, or overloading the chamber with too much waste at once. If the impellers are stuck in a fixed, immobile position due to corrosion or wear, they cannot swing outward to crush food items effectively. Verification: Turn off power, inspect the grinding chamber with a flashlight for foreign objects, and ensure food waste is fed in small batches with cold water running.
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