Should you repair or replace your garbage disposal?
Updated August 2026
← Every repair-or-replace call
Press the red reset button and turn the flywheel with the hex wrench before spending a dollar; if that does not revive it, replace the disposal rather than repair it. A jam or a tripped overload accounts for most dead units and costs nothing to clear. Once the motor is genuinely burned out or water weeps from the grinding chamber, no economical repair exists, because a new 1/2 to 3/4 hp disposal is only $80–200, or $150–400 installed. Disposals last 8–12 years, and past 10 a swap is the honest answer to almost any complaint.
The short version
Disposals are sealed appliances, so the repairable list is short: the reset, a jam, a leaking sink flange, and a loose discharge tube. Everything else lives inside a welded housing that nobody rebuilds for less than the price of a new unit. Run the free checks in order. Reset button underneath, 1/4-inch hex wrench in the bottom socket to free the flywheel, then power. A unit that still hums without turning has lost its motor or its bearings. Water dripping from the seam of the body is the other automatic replace, since the internal seal is gone and rust follows fast. Leaks at the sink flange or the dishwasher inlet are a different animal and worth fixing for $5–40 in putty and clamps.
Your situation, decided
| Situation | Verdict | Why |
|---|---|---|
| Dead, no hum, breaker is fine | Repair (free) | Press the reset button on the underside; most units restart |
| Hums but will not turn | Repair (free) | Free the flywheel with the 1/4-inch hex wrench, then reset |
| Hums and trips with the flywheel already free | Replace | A burned motor; an $80–200 unit beats any rebuild |
| Water dripping from the body seam | Replace | The internal seal has failed; housings are not serviceable |
| Leak at the sink flange or dishwasher hose | Repair | Fresh plumber putty or a $5–15 clamp, not a new disposal |
What each path costs
Repairs typically run $0–40; a replacement is $150–400 installed. A garbage disposal lasts 8–12 years, less with heavy use and hard scraps. Free resets and jam clears are always worth trying first; past 10 years, a real failure means replace. Price your own number on the home maintenance cost calculator before you commit either way.
The repair-or-replace call is easy when you know the unit's age and service history. OnOtto keeps both, plus the maintenance that delays this decision for years.
Start your home's service log, freeFrequently asked questions
Why does my garbage disposal hum but not spin?
Something is wedged against the impellers and the motor is stalled. Switch it off, fit the 1/4-inch hex wrench that came with the unit into the socket underneath, and work the flywheel back and forth until it turns freely. Fish out the bone, pit, or bottle cap with tongs, never your hand, then press the reset button and try again. If it still only hums with the flywheel spinning freely, the start winding has failed and the unit is finished at $80–200 to replace.
Is a 3/4 hp disposal worth the extra money?
For a household that actually cooks, yes. The 1/3 hp builder-grade unit is the one that jams weekly and dies around year six; stepping up to 1/2 hp costs $80–130 and 3/4 hp runs $130–200. Bigger motors grind finer, clear fibrous scraps without stalling, and carry thicker sound insulation, which is the difference most people notice first. Installation is identical either way, so the upgrade is pure parts cost at swap time. Skip the top of the range unless the house feeds a crowd.
What actually shortens the life of a disposal?
Grease, fibrous scraps, and running it dry. Fat congeals downstream and becomes the clog people blame on the disposal, celery and corn husks wrap the impellers, and coffee grounds pack the trap. Run cold water for 20 to 30 seconds after the grinding stops so waste clears the trap arm. A monthly round of ice cubes and coarse salt scours the grind ring; the cleaning schedule and the full checklist keep an 8 to 12 year unit at the top of its range.