Garbage disposal outlet keeps tripping the GFCI

Symptoms

• GFCI outlet under the sink trips when disposal is used
• Resetting the GFCI works temporarily
• Outlet near the sink feels damp or has visible corrosion
• Other GFCI-protected outlets in the kitchen also trip

Likely causes

• CommonMoisture inside the outlet or plugLeaks from the disposal or sink plumbing can dampen the electrical connection.
• CommonGround fault inside the disposal motorWater intrusion into the motor housing trips the GFCI as a safety response.
• PossibleWorn or damaged power cord on the disposalA nicked or pinched cord can cause an intermittent ground fault.
• Less commonFaulty GFCI outlet itselfGFCI outlets can wear out and become overly sensitive or defective.

What to do

1. Check under the sink for any active leak from the disposal or supply lines and fix it first.
2. Dry the outlet, plug, and surrounding area thoroughly before resetting the GFCI.
3. Reset the GFCI and run the disposal briefly while watching for it to trip again.
4. Inspect the disposal's power cord for cracks, kinks, or pinch points along its length.
5. Try plugging a different appliance into the same outlet to see if the GFCI trips regardless of what's plugged in.
6. If the disposal itself trips the GFCI even with a dry outlet and good cord, treat it as a ground fault in the unit.

Tools and parts

• Flashlight
• Dry towel

When to call a pro

If drying everything doesn't stop the trips, have an electrician test the disposal and outlet for a ground fault before continuing to use it.

Safety