Maxmatic Ground Fault / Leakage Current

Garbage disposal trips the GFCI outlet but not the main breaker when turned on.

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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

Moisture inside motor housing, Damaged power cord insulation, Internal winding-to-ground fault, Water in sink switch or junction box

How to Fix / Troubleshooting

Safety first: Do not repeatedly reset a tripping GFCI. Turn off the breaker and unplug the disposal if possible.

  • Inspect for leaks: Look for any water around the disposal, sink flange, and electrical connections. Repair leaks before further testing.
  • Dry components: Allow the unit and surrounding area to dry completely for at least 24 hours, then test again.
  • Check cord and plug: Replace the Maxmatic power cord set if there are any cuts, abrasions, or burn marks.
  • Isolate the circuit: Plug another appliance into the same GFCI to confirm the outlet itself is not faulty.

If the GFCI continues to trip only when the disposal is used, an internal ground fault is likely present and the disposal should be replaced.

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Repair Difficulty

Medium 3/5

Required Part

Maxmatic Power Cord Set
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