Garbage disposal trips the GFCI outlet or circuit breaker immediately or within a few seconds of being turned on.

Safety warning: Do not repeatedly reset a tripping breaker or GFCI. This indicates a potentially dangerous electrical fault.

• Step 1 – Inspect for leaks: Turn off power at the breaker. Check around the disposal housing and junction box for signs of water leaks from the sink flange or plumbing.
• Step 2 – Check power cord and plug: Look for cuts, crushed sections, or burn marks. Replace the cord set if damaged.
• Step 3 – Inspect junction box wiring: Remove the junction box cover on the disposal. Ensure no bare wires are touching the metal housing and that wire nuts are secure.
• Step 4 – Dry the unit: If there is moisture, dry the exterior thoroughly and allow several hours for internal moisture to evaporate. Do not use heat guns directly on the housing.
• Step 5 – Test on a known-good circuit: If possible, plug the disposal into another GFCI-protected outlet temporarily (using a safe extension only if rated). If it still trips, the motor is likely shorted.
• Step 6 – Replace if shorted: If the disposal continues to trip the breaker/GFCI after wiring and moisture issues are ruled out, the motor windings are likely compromised. Replace the disposal; internal motor repair is not cost-effective.