Garbage disposal runs but produces a high-pitched squeal or screeching sound.

Safety First: Turn OFF power at the breaker before inspecting the unit. Do not attempt to lubricate sealed bearings.

Step-by-step:

• 1. Confirm the source: Run water and briefly turn on the KitchenAid disposal while listening carefully. Ensure the noise is from the disposal, not the dishwasher or drain pipes.
• 2. Check for chamber obstructions: With power OFF, inspect the grind chamber for foreign objects that might rub against the shredder ring and remove them.
• 3. Manual rotation test: Use the bottom hex socket to rotate the shaft. A rough, gritty, or tight feel suggests bearing wear.
• 4. Avoid lubrication attempts: KitchenAid disposal motors are sealed; adding oil or grease externally will not repair worn bearings and may be unsafe.
• 5. Plan for replacement: Continued use with failing bearings can lead to motor seizure or electrical failure.

When to call a technician: Bearing replacement is not practical on sealed disposal motors; the recommended repair is replacement of the entire disposal unit.