Garbage disposals are one of those modern kitchen conveniences we often take for granted—until something goes wrong. If your garbage disposal is humming but not spinning, you might be wondering what’s going on—and whether it’s safe to fix it yourself.
In this article, we’ll walk you through why a garbage disposal hums, how these units work, and cover other frequently asked questions homeowners often have.
Why Is My Garbage Disposal Humming?
A humming garbage disposal typically means it’s getting power, but the blades aren’t turning. That hum is the motor trying to spin, but something is stopping it.
Common Causes:
Jammed Impeller Plate:
Food scraps or foreign objects like bones or silverware may be stuck, preventing the blades from moving.Motor Overload:
If the disposal was overworked or jammed for too long, the motor could overheat and shut off.Worn Bearings or Broken Motor:
If it hums and trips the reset button repeatedly, the motor may be failing.
✅ Quick Fix Tip:
Always turn off power first. Then, insert an Allen wrench into the bottom of the disposal’s hex hole (center of the underside) and manually turn it back and forth to clear the jam. Press the red reset button if it tripped.
How Does a Garbage Disposal Work?
A garbage disposal doesn’t have sharp blades—it uses a spinning impeller plate and stationary shredder ring to grind food into tiny particles. These particles are then flushed out through your drain system.
It’s meant for small food scraps only. Things like eggshells, coffee grounds, fibrous vegetables (celery, corn husks), or grease can clog or damage your unit.
Can a Garbage Disposal and Dishwasher Be on the Same Circuit?
Yes, and they often are. Many homes share a dedicated 15-amp or 20-amp circuit for both. However, it’s important to make sure:
The circuit isn’t overloaded.
A licensed electrician or plumber has checked the setup.
GFCI protection is used where required.
In most homes, the dishwasher drains through the garbage disposal—which is why you might notice dishwasher water backing up into the sink if your disposal is clogged.
Is My Garbage Disposal Supposed to Be Loose?
Nope. The disposal unit should be securely mounted to the sink flange and shouldn’t wobble. If it's loose:
You might notice vibrations, leaking, or a bad odor.
The mounting ring or sink flange may need to be tightened or resealed.
If water is leaking from underneath, it may be time for a replacement.
Could I Cut My Hand in the Disposal?
Garbage disposals use blunt impellers, not razor-sharp blades—but yes, they can injure you.
Never put your hand inside a disposal, even if it’s off. Use pliers or tongs to remove stuck objects. If you need to work on it, unplug it or turn off the circuit breaker first.
Who Can Fix a Garbage Disposal?
If your disposal is:
Constantly tripping the reset button,
Leaking from underneath,
Making loud or grinding noises, or
Humming without turning—
👉 It’s time to call a licensed plumber.
At Applause Plumbing and Heating, we install, repair, and replace garbage disposals across New Jersey and Pennsylvania. We’ll diagnose the issue and let you know if repair or replacement is best for your budget and needs.
Where Is the Reset Button on a Garbage Disposal?
Look underneath the disposal unit. There should be a small red button near the center.
If it popped out, press it back in.
If it won’t stay in or trips again after starting, the motor may be overheated or damaged.
Let the motor cool down for 10–15 minutes before resetting. If it continues to trip, you may need service or a replacement.
Final Thoughts: Keep Your Garbage Disposal Running Smoothly
A humming garbage disposal is a sign something’s off, but in many cases, it’s a quick fix. Still, if you’re unsure, it’s always safer to let a professional handle it.
🛠️ Need help with a humming disposal, dishwasher drainage issue, or a full replacement?
📞 Call Applause Plumbing and Heating or Request an Estimate today. We'll get your kitchen back to smooth operation in no time.