Garbage disposal will not start from the air switch (countertop button), but runs if directly powered.

Safety First: Turn OFF power to the disposal before working under the sink or on the air switch module.

Step-by-step:

• 1. Inspect air tube: Locate the small plastic or rubber tube running from the countertop air button to the air switch module controlling the KitchenAid disposal. Ensure it is firmly connected at both ends and not kinked.
• 2. Test air pulse: With the tube disconnected from the module, press the countertop button and feel for a puff of air. If none, the button may be clogged or defective.
• 3. Clean button: Remove the air button from the countertop and clean any debris or grease from the port.
• 4. Replace air switch module: If air is present but the module does not click or switch power, replace the air switch control box with a compatible unit.
• 5. Test operation: Restore power and verify that pressing the air button reliably starts and stops the disposal.

When to call a technician: If the air switch is integrated into a complex control system or inaccessible countertop, professional service may be needed.