Error Code	Symptom	Fault Type	Guide
–	Disposal causes a buzzing or humming noise from the wall switch or air switch control box	Switch Contact Arcing / Underrated Control	View Details
–	Disposal causes a loud thump or bang when starting or stopping	Excessive Torque Reaction / Loose Mount	View Details
–	Disposal causes noticeable dimming or flickering of kitchen lights when starting	High Inrush Current / Marginal Circuit	View Details
–	Disposal does not start from the air switch button on the countertop	Air Switch Actuation Failure	View Details
–	Disposal emits a burning smell or smoke when running	Motor Overheating / Electrical Insulation Breakdown	View Details
–	Disposal hums when switched on but the grinding plate does not turn	Impeller Plate Jam / Rotor Locked	View Details
–	Disposal is completely dead, no humming, no sound when wall switch or air switch is turned on	No Power / Open Circuit	View Details
–	Disposal is misaligned with existing plumbing after replacement; cannot connect discharge without strain	Improper Plumbing Alignment / Installation Issue	View Details
–	Disposal is unusually quiet and appears to run, but food is not being ground or discharged	Impeller Lugs Stuck / Plate Spinning Without Agitation	View Details
–	Disposal is very hot to the touch after short use and shuts off	Thermal Overload from Overheating	View Details
–	Disposal makes a high-pitched squealing or chirping noise when running	Bearing or Shaft Friction / Foreign Object Contact	View Details
–	Disposal motor runs but grind plate does not spin (viewed from above) and no grinding occurs	Sheared Coupling / Internal Drive Failure	View Details
–	Disposal runs but does not grind effectively; food remains unprocessed or takes very long to clear	Dull Grind Components / Low Torque	View Details
–	Disposal runs but makes loud metal-on-metal grinding, rattling, or clanking noises	Foreign Object in Grind Chamber	View Details
–	Disposal runs but water backs up into sink and does not drain through the unit	Discharge / Drain Outlet Blockage	View Details
–	Disposal runs but water leaks from around the reset button area only when the unit is running	Dynamic Internal Leak Under Pressure	View Details
–	Disposal runs but water leaks from the side discharge elbow connection	Discharge Elbow Gasket / Connection Leak	View Details
–	Disposal runs but water slowly leaks from the junction box cover or wiring compartment	Water Intrusion into Electrical Compartment	View Details
–	Disposal runs intermittently when the sink or unit is bumped	Loose Electrical Connection / Intermittent Power	View Details
–	Disposal runs very loudly compared to when it was new, with a harsh or roaring sound	Worn Motor Bearings / Internal Mechanical Wear	View Details
–	Disposal splashes water and food particles up out of the sink opening during use	Missing or Worn Splash Guard / Excessive Back-Splash	View Details
–	Disposal starts but then stops abruptly within a few seconds without tripping the red reset button	Intermittent Power Loss / Loose Connection	View Details
–	Disposal trips the household circuit breaker or GFCI outlet when turned on	Short Circuit / Ground Fault	View Details
–	Disposal trips the red reset button frequently during or shortly after use	Overload / Overcurrent Protection Tripping	View Details
–	Disposal vibrates excessively and causes the sink or countertop to shake during operation	Imbalanced Grind Plate / Mounting Instability	View Details
–	Disposal will not accept food easily; opening seems restricted and food sits on top	Deformed or Incorrect Splash Guard Restricting Inlet	View Details
–	Disposal will not mount securely to existing sink mount; unit sags or will not lock into place	Incompatible or Damaged Mounting Assembly	View Details
–	Disposal will not start unless the reset button is pressed each time before use	Overload Reset Mechanism Fault	View Details
–	Disposal will not turn off; continues running even when wall switch is off	Stuck Switch / Miswired Circuit	View Details
–	Newly installed InSinkErator disposal causes dishwasher to back up into sink or leak from dishwasher hose connection	Dishwasher Inlet Knockout Not Removed / Improper Hose Connection	View Details
–	Persistent foul odor from disposal even after running water and grinding ice	Organic Buildup in Grind Chamber and Discharge	View Details
–	Water backs up into the opposite sink bowl when disposal is running (on a double sink)	Shared Drain Line Restriction	View Details
–	Water leaks from the bottom of the disposal housing (from motor area or reset button)	Internal Seal / Grind Chamber Leak	View Details
–	Water leaks from the side of the disposal where the dishwasher hose connects	Dishwasher Inlet Connection Leak	View Details
–	Water leaks from the top of the disposal where it mounts to the sink (around the sink flange)	Sink Flange Seal Failure	View Details

InSinkErator Garbage Disposals Error Codes

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