How to Fix a Garbage Disposal
Most garbage disposal problems are one of three issues: it won't turn on (tripped overload button or wiring), it hums but doesn't spin (jammed impeller), or it leaks. All three are DIY-fixable in under 30 minutes. If none of these fixes work, a new disposal costs $80–$200 and installs in an hour.
Likely Causes
- 1Tripped overload protector (thermal reset button)
- 2Jammed impeller from a hard object (bone, glass, silverware)
- 3Wiring issue or tripped circuit breaker
- 4Worn out motor (humming but not spinning after unjamming)
- 5Leak at the sink flange, discharge pipe, or reset button area
Low urgency. Don't use the sink drain until it's fixed to avoid clogging the drain further.
How to Fix It: Step by Step
- 1Check the reset button and circuit breaker
Look under the disposal for a small red or black reset button. Press it firmly. Also check the electrical panel for a tripped breaker. This fixes most 'dead' disposals.
- 2Unjam the impeller
Insert the hex wrench that came with the disposal (or a 1/4-inch Allen wrench) into the hex port at the bottom center of the disposal. Turn it back and forth to free the jam. Do this with power OFF.
- 3Remove the jam manually
With power off and unplugged, use tongs (never your hand) to reach into the disposal and remove whatever caused the jam.
- 4Address a leak at the sink flange
Tighten the mounting assembly under the sink. If that doesn't stop it, the plumber's putty seal under the flange has failed — remove the disposal, reseal with plumber's putty, and reinstall.
- 5Test after fixes
Restore power, run cold water, and press the reset button one more time if needed. Turn on the disposal.
Materials & Tools Needed
Warning Signs It's Getting Worse
- ⚠Disposal leaks from the bottom (motor seal failed — replace the unit)
- ⚠Loud grinding noise after unjamming (bearing damage)
- ⚠Repeated trips of the reset button on the same day
When to Call a Professional
Replacing a disposal with a new one is a beginner-friendly DIY. Call a plumber if the electrical outlet under the sink has issues (not just the disposal), or if you're not comfortable working near water and electricity.
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