Last updated: 2026-05-01
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Garbage Disposal Humming But Not Grinding
Disposal makes a humming sound but the flywheel doesn't spin
90%
90% chance this is caused by:
Jammed flywheel — something is stuck between the impellers and the grind ring
🔧 The Exact Part You Need
Good news — this fix doesn't require replacement parts. It's a cleaning or adjustment procedure. Follow the steps below.
🔨 Tools You'll Need
Easy · 5-10 minutes
Parts: $0 vs $$100-300 to replace
📋 Step-by-Step Instructions
1
Turn OFF the disposal — never stick your hand in while it's on
2
Insert a 1/4 inch Allen wrench into the hole at the bottom center of the unit
3
Work the wrench back and forth to free the jammed flywheel
4
Remove whatever was causing the jam (use tongs, never your hand)
5
Press the red reset button on the bottom
6
Run cold water and turn on the disposal to test
Other Garbage Disposal Problems
Frequently Asked Questions
How much does it cost to fix a garbage disposal that's humming but not grinding?
The part costs about $20-50. If you do it yourself, that's your total cost. A professional service call would add $100-200 in labor, bringing the total to $170-250.
How long does this garbage disposal repair take?
This repair is rated "easy" and typically takes 5-10 minutes. The most time-consuming part is usually accessing the component, not the actual swap.
What if this isn't the problem?
Our diagnosis is 90% likely based on the symptom you described. If replacing this part doesn't fix it, the next most common cause for "disposal makes a humming sound but the flywheel doesn't spin" would be related to the wiring harness or control board. In that case, consider calling a professional.
Should I just replace my garbage disposal instead?
A new garbage disposal costs $100-300. If yours is well under 8-15 years old, a $20-50 repair is far more cost-effective. If it's near end-of-life and has had multiple issues, replacement starts making more sense.