Keep a Garbage Disposal Running: The Reset, the Jam, and the Flush

Know where the reset button sits, clear a jam without reaching into the chamber, and flush the unit on a routine you write down.

A disposal is simple until it stops. Most stops come from a jam, a tripped reset, or a drain that is slow for reasons outside the unit. Learn the power path once, then handle each stop in the order below.

Know the power path

Find the wall switch that controls the unit, the breaker that feeds it, and the reset button on the underside of the housing. Label the breaker in your panel directory if the label is missing. Knowing all three before a stop saves you from guessing during one.

Cut the power before you reach in

Turn off the wall switch, and if you are unsure of the switch, turn off the breaker as well. Never put a hand into the chamber while the unit could turn on. Use only the tools the manufacturer supplies for this purpose, and use a flashlight to look.

Clear a jam

Many units ship with a hex wrench that fits a socket on the underside of the motor. Insert it and turn it back and forth to free the jammed parts. Then remove whatever caused the jam with tongs or pliers. Do not force the motor, and do not pry at the blades with metal objects.

Reset after the jam is clear

If the unit hummed and stopped, the thermal reset may have tripped. Once the power is off and the jam is cleared, press the reset button on the underside, then restore the power. Give the unit the short cooling pause the manual calls for before you try it again.

Flush and feed it right

Run cold water before you feed scraps, keep it running while the unit grinds, and let it run a short time after. Feed small amounts at a time. Keep fibrous material, grease, and large bones out of the chamber. A regular cold flush keeps the drain path clear.

Check the drain before you blame the unit

A slow sink can come from the trap, the discharge line, or a clog farther down. Check the trap and the connection under the sink before you assume the disposal is the cause. Write down each stop, the reset you used, and the install year, so the record is clear when you plan the next step. The Garbage Disposal: typical service life and when to plan page lists the planning window.