A stuck air switch push button on a garbage disposal—commonly found on island sinks connected via an air tube to the under-sink control module—usually results from moisture trapped inside the flexible vinyl tubing, salt corrosion around the button housing, or a pinched bellows seal. Unplug the control box under the sink, disconnect the thin plastic air tube from the module, and gently blow compressed air through the tube to clear any accumulated condensation. Clean the mechanical button spring with mild soap, reattach the airtight tubing securely, and verify success when pressing the button produces a clean, audible click that toggles the motor.
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