Guardian opener light flashes and door will not close from remote, but will close if wall button is held down.

Safety first: Do not permanently bypass safety sensors. They prevent serious injury.

• Check sensor LEDs: Confirm both Guardian safety sensors have solid LEDs when the door is open. If one is off or flickering, alignment or wiring is faulty.
• Realign sensors: Adjust the sensor brackets until both LEDs are solid. Tighten brackets securely.
• Inspect wiring: Verify correct polarity at the opener terminals and at each sensor. Repair any damaged cable.
• Shield from sunlight: If direct sun hits a sensor, add a small shade or reposition slightly while maintaining alignment.
• Replace sensors: If alignment and wiring are correct but one LED will not light, replace the Guardian safety sensor pair.