Do you have a question about the 139.18451D and is the answer not in the manual?
Questions and answers
Mike
February 23, 2025
Motor just hums
1 comments:
Mr. Anderson
February 23, 2025
The Craftsman motor with part number 139.18451D hums but does not operate due to one of the following reasons:
1. RPM Sensor Failure – If the motor unit hums briefly and moves only 6-8 inches (15-20 cm), the RPM sensor may be faulty. Try resetting the unit by unplugging it. If the issue persists and the unit still flashes 5 times, replace the RPM sensor.
2. Motor Overheating – If the motor does not move at all, it may be overheated. Unplug the unit, wait 30 minutes, then retry.
3. Logic Board Failure – If the motor still does not operate after cooling down and resetting, the logic board may need to be replaced. The manual suggests that motor failures are rare, so replacing the logic board is recommended.
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Do you have a question about the 139.18451D and is the answer not in the manual?
Questions and answers
Motor just hums
The Craftsman motor with part number 139.18451D hums but does not operate due to one of the following reasons:
1. RPM Sensor Failure – If the motor unit hums briefly and moves only 6-8 inches (15-20 cm), the RPM sensor may be faulty. Try resetting the unit by unplugging it. If the issue persists and the unit still flashes 5 times, replace the RPM sensor.
2. Motor Overheating – If the motor does not move at all, it may be overheated. Unplug the unit, wait 30 minutes, then retry.
3. Logic Board Failure – If the motor still does not operate after cooling down and resetting, the logic board may need to be replaced. The manual suggests that motor failures are rare, so replacing the logic board is recommended.
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