Liftmaster La400 - Power On, Stop On, Close Edge On

1. Check for obstructions: Make sure that there are no physical obstructions preventing the gate from moving. This could include debris, vehicles, or other objects blocking the gate's path.
2. Check the gate's alignment: Make sure that the gate is properly aligned with the opener's mechanism. An improperly aligned gate can cause the opener to sense an obstruction.
3. Check the photo eyes: Make sure that the photo eyes, which are safety sensors that prevent the gate from closing on an obstruction, are properly aligned and not blocked by debris or dirt.
4. Check for a malfunctioning control board: The control board may be malfunctioning and not properly sensing the gate's movement or obstructions. This may require professional service.
5. Check the manual: Consult your opener's manual for troubleshooting steps specific to your model.
6. Check for power issues: Make sure that the opener is properly plugged in and that the circuit breaker is not tripped.
7. Try a factory reset: A factory reset may help resolve any software-related issues. Consult the manual on how to perform a factory reset on your specific model.

If none of the above steps resolves the issue, it may be a hardware problem and you should contact the manufacturer or an authorized service center for further assistance.

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