Moen Switch or Wiring Fault (Continuous Power)

Moen garbage disposal turns on by itself or will not turn off with the wall switch

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Stuck wall switch contacts, Miswired constant-hot feed to disposal outlet, Shorted switch loop, Faulty air switch (if used with Moen air switch kit)

How to Fix / Troubleshooting

Safety first: Immediately switch off the circuit breaker feeding the disposal. Do not use the sink until the issue is corrected.

  • Identify control type:
    • Determine if the disposal is controlled by a wall switch or a countertop air switch (Moen air switch kit).
  • Test the switch:
    • For a wall switch, replace it with a new, properly rated switch if it feels loose or fails to click.
    • For an air switch, disconnect the air tube and power module, then test with a standard switched outlet if available.
  • Check wiring (qualified persons only):
    • Verify that the disposal outlet is wired to the switched hot, not constant hot.
    • Correct any miswiring per local electrical code.
  • Do not operate until fixed:
    • Leave the breaker off until the switch or wiring fault is resolved to prevent accidental operation.
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Repair Difficulty

Hard 4/5

Required Part

Wall Switch or Air Switch Module
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