Oster Grinder Motor / Burr Obstruction

The Oster coffee maker with a built-in grinder does not grind beans or makes a loud humming noise without grinding.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Beans jammed in the grinder chute, Foreign object in the grinder, Worn or seized grinder motor, Broken drive coupling.

Safety first: Unplug the coffee maker before accessing the grinder. Keep fingers away from sharp burrs.

Clear jams:

Remove the bean hopper and any accessible parts of the grinder.
Use a small brush or vacuum to remove beans and grounds from the grinder chamber and chute.

Inspect for foreign objects:

Look for stones, metal, or other hard objects that may have entered with the beans.

Test motor:

After clearing, reassemble and briefly power on to test. If the motor only hums or does not turn, the grinder motor or drive coupling may need replacement.

Hard 4/5

Grinder Motor Assembly

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