Up Arrow LED Blinks 5 Times
LiftMaster
RPM Sensor Fault / Motor Speed Feedback Error
LiftMaster opener stops and reverses when closing; UP arrow LED blinks five times.
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Safety Warning
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.
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Possible Causes
Dirty or damaged RPM sensor wheel, loose RPM sensor bracket, failed RPM sensor, disconnected RPM harness
How to Fix / Troubleshooting
Safety: Unplug opener before removing cover.
- Access RPM sensor: Remove the opener cover. Locate the RPM sensor near the motor shaft or gear assembly.
- Clean sensor wheel: Use a soft brush or compressed air to remove dust or debris from the encoder wheel and sensor gap.
- Check bracket: Ensure the sensor is properly aligned with the wheel and not bent away or rubbing.
- Verify harness: Confirm the RPM sensor plug is fully seated on the logic board and at the sensor.
- Replace sensor: If cleaning and reseating do not resolve the issue, install a new LiftMaster RPM sensor assembly.
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Repair Difficulty
Medium
3/5
Required Part
RPM Sensor Assembly
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