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If the grinder does not run when turned on, make sure power is on to the outlet, then check the
electrical cord.If the grinder runs intermittently or doesn't stop, the
switch may be clogged or damaged. Unplug the grinder and brush any grounds from the switch with a fine brush. Depress the switch several times with a toothpick. If the problem persists, disassemble the grinder to clean it and inspect the switch for breaks that you can fix.
If the grinder does not run, the
motor shaft may be frozen. Disassemble the grinder, clean the shaft and lubricate each bearing point with one or two drops of lightweight machine oil. Rotate the shaft to evenly distribute the oil.
Most coffee grinders are accessed by removing fasteners on the base of the device.If the grinder still does not operate, the thermal limiter may be burned out. If you can't readily find a replacement thermal limiter, it may be more cost effective to replace the grinder.
If the grinder vibrates, the blade may be bent. Inspect the blade and replace if it is damaged or dull. Another cause of vibration could be a worn motor bearing. Unplug the grinder and remove the access plate. The bearing is bad if the motor shaft moves when pushed back and forth; replace the grinder.
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