Garage door starts to move then reverses immediately, with the Nice opener light flashing several times.

Safety first: Keep clear of the door while testing safety devices.

• Clear the path: Remove any objects, tools, or vehicles from the beam path between the photocells.
• Check LEDs: Observe the LED on the receiver photocell. If it flickers or goes off when the door moves, realign the photocells until the LED is solid.
• Shield from sunlight: If direct sun hits the receiver, install the supplied sun shield or slightly angle the photocell to reduce glare while maintaining alignment.
• Tighten brackets: Ensure the photocell brackets are firmly attached and do not move when the door vibrates.