A garbage disposal that hums but doesn't spin is jammed — something is stuck between the grinding plate and the wall. One that's completely dead usually just tripped its reset. Both are often things you can safely fix yourself in a few minutes. Here's how a tech does it — safely, because the #1 rule with a disposal is hands stay out.
The most common cause of a hum: a bone, fruit pit, utensil, or fibrous scraps wedged the grinding plate so the motor can't turn. The hum is the motor straining against the jam — leave it humming and it'll trip off or burn out.
Check it: Turn the disposal OFF. Insert the small hex/Allen wrench (that came with it) into the socket on the BOTTOM center of the unit and turn it back and forth to free the flywheel. No wrench? An old broom handle in the opening (power off!) can rock it free. Then fish out the debris.
If the disposal is totally silent and dead, its overload protector tripped — usually after a jam or overload.
Check it: Look for the small red reset button on the BOTTOM of the unit and press it in. Then try the switch again (after clearing any jam).
A disposal on a wall switch and outlet under the sink can lose power at a tripped breaker or a bad switch.
Check it: Check the breaker and that the under-sink outlet has power. If the outlet is dead, that's the issue to chase.
If it's not jammed, reset, and has good power but still won't run — or it leaks from the body — the disposal itself has failed.
Check it: A disposal that's dead with power and no jam, or leaking from the housing, is usually replaced rather than repaired — a quick, affordable swap for a tech.
Repair (free) if it's a jam or reset; replace the unit if the motor's dead or it leaks from the body — disposals are inexpensive and a fast swap, so a failed one is replaced, not rebuilt.
In Middle Tennessee or the Baton Rouge area? We'll come to you, same-day. Anywhere else in the U.S.? Send a 10-second video, a real technician tells you exactly what's wrong for $50 (credited toward the repair), and we ship you the exact part. 24/7 — text, call, or upload anytime.
It's jammed — something is stuck so the motor can't turn. Turn it OFF, then use the hex wrench in the socket on the bottom to rock the flywheel free, clear the debris, and press the reset button. Never use your hand.
It's a small (usually red) button on the bottom center of the unit under the sink. If the disposal is dead and silent, press it in, then try again after clearing any jam.
If it has power, isn't jammed, and still won't run, or if it leaks from the body, replace it — disposals are inexpensive and a quick swap. Your $50 Quick Check credits toward the work.