LiftMaster
Safety Reversal System Activated
Garage door will open but will not close from remote; must hold wall button down to close.
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Possible Causes
Misaligned or blocked safety sensors, sensor wiring fault, sensor LED off or flickering
How to Fix / Troubleshooting
Safety: Holding the wall button overrides the safety sensors; only do this while watching the door and as a temporary measure.
- Check sensor LEDs: Confirm both safety sensor LEDs are solid. If not, realign or repair wiring as described in sensor entries.
- Clean lenses: Wipe sensor lenses with a soft cloth.
- Secure brackets: Tighten sensor brackets so they do not move when the door vibrates.
- Test: Once both LEDs are solid, the door should close normally from the remote.
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Repair Difficulty
Easy
2/5
Required Part
Safety Sensors
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