Whirlpool Stuck or Miswired Wall Switch

Whirlpool garbage disposal will not turn off unless the breaker is switched off.

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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

Shorted wall switch contacts, Miswired constant hot to disposal, Stuck relay in electronic control (if equipped), Crossed wires in junction box

How to Fix / Troubleshooting

Safety first: Turn off the breaker before working on any electrical components.

  • Test wall switch: Remove the switch cover and test the switch with a continuity tester. Replace if it shows continuity in the OFF position.
  • Verify wiring: Compare the wiring in the switch box and under-sink junction box to the Whirlpool wiring diagram. Ensure the hot feed goes through the switch before reaching the disposal.
  • Check control module: For models with an electronic control, inspect for a stuck relay or burned board. Replace the control module if the relay is welded closed.
  • Restore power and test: After correcting wiring or replacing the switch/control, restore power and verify proper on/off operation.
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Repair Difficulty

Medium 3/5

Required Part

Wall switch or Whirlpool electronic control module
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