Manually Crank the Disposal Motor — Attempt to Free the Jam from Below
Part of project
How to Fix a Humming or Jammed Garbage Disposal · Step 3 of 7
In this video
Access the underside of the sink to locate the garbage disposal unit. At the very bottom center of the unit, you will find a hexagonal socket. Insert a 1/4-inch Allen wrench (often called a jam-buster wrench) into this socket. Manually turn the wrench back and forth, both clockwise and counter-clockwise. This forces the internal flywheel to move, which will work to dislodge whatever object is causing the jam. Continue this motion until you can feel the flywheel rotate a full 360 degrees freely.
Goal: Free the jammed flywheel.
- It may require significant force to get the flywheel moving initially.
- The video uses a demonstration model to show the process clearly. The hole is in the center of the bottom plate.
Used in this video
- Allen Wrench (brand: Not specified, Allen Wrench Size: 1/4 inch) — To insert into the bottom of the disposal and manually turn the motor to free a jam.
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FAQs
What is the most crucial safety step before I start, and why?
The most crucial safety step is to ALWAYS disconnect power to the garbage disposal at your home's circuit breaker before performing any work. This prevents the unit from accidentally turning on, which could lead to severe injury while your hands or tools are inside the disposal.
My disposal is humming but not grinding; does this mean it's jammed, and how is that different from a complete jam?
Yes, a humming disposal almost always indicates it's jammed. The motor is receiving power but cannot turn the grinding plates due to an obstruction. A 'complete jam' means the motor isn't even humming, often indicating the reset button has tripped due to overload.
Do I need all the specific tools listed, like the specialized wrench, or are there alternatives for clearing a jam?
While the project lists a general wrench and a precision screwdriver, the most critical tool for freeing a jam from below is a 1/4-inch hex key or Allen wrench, which often comes with new disposals. A strong flashlight like the Panther Vision FLATEYE is highly recommended for visibility, and tongs or pliers are great for removing items from above instead of your hand.
I've pressed the reset button, but my disposal still won't work or just hums again. What should I do next?
If the reset button immediately trips again or the disposal hums but doesn't spin, it likely means the obstruction hasn't been fully cleared, or there's a more serious electrical issue. Go back to step 3 to thoroughly ensure no items are obstructing the grinding plates and try manually turning the flywheel again with the hex key. If problems persist, it might be time to call a plumber.
Manually Crank the Disposal Motor — Attempt to Free the Jam from Below
Part of project
How to Fix a Humming or Jammed Garbage Disposal · Step 3 of 7
In this video
Access the underside of the sink to locate the garbage disposal unit. At the very bottom center of the unit, you will find a hexagonal socket. Insert a 1/4-inch Allen wrench (often called a jam-buster wrench) into this socket. Manually turn the wrench back and forth, both clockwise and counter-clockwise. This forces the internal flywheel to move, which will work to dislodge whatever object is causing the jam. Continue this motion until you can feel the flywheel rotate a full 360 degrees freely.
Goal: Free the jammed flywheel.
- It may require significant force to get the flywheel moving initially.
- The video uses a demonstration model to show the process clearly. The hole is in the center of the bottom plate.
Used in this video
- Allen Wrench (brand: Not specified, Allen Wrench Size: 1/4 inch) — To insert into the bottom of the disposal and manually turn the motor to free a jam.
Frequently Asked Questions
What is the most crucial safety step before I start, and why?
The most crucial safety step is to ALWAYS disconnect power to the garbage disposal at your home's circuit breaker before performing any work. This prevents the unit from accidentally turning on, which could lead to severe injury while your hands or tools are inside the disposal.
My disposal is humming but not grinding; does this mean it's jammed, and how is that different from a complete jam?
Yes, a humming disposal almost always indicates it's jammed. The motor is receiving power but cannot turn the grinding plates due to an obstruction. A 'complete jam' means the motor isn't even humming, often indicating the reset button has tripped due to overload.
Do I need all the specific tools listed, like the specialized wrench, or are there alternatives for clearing a jam?
While the project lists a general wrench and a precision screwdriver, the most critical tool for freeing a jam from below is a 1/4-inch hex key or Allen wrench, which often comes with new disposals. A strong flashlight like the Panther Vision FLATEYE is highly recommended for visibility, and tongs or pliers are great for removing items from above instead of your hand.
I've pressed the reset button, but my disposal still won't work or just hums again. What should I do next?
If the reset button immediately trips again or the disposal hums but doesn't spin, it likely means the obstruction hasn't been fully cleared, or there's a more serious electrical issue. Go back to step 3 to thoroughly ensure no items are obstructing the grinding plates and try manually turning the flywheel again with the hex key. If problems persist, it might be time to call a plumber.