Door will not close from remote at night but works in daylight; opener light flashes and door reverses.

Safety first: Do not disable safety beams for normal use.

• Observe LEDs: At night, check the indicator LEDs on the photocells while operating the door. If they flicker or go out, alignment or interference is likely.
• Re‑align sensors: Adjust the brackets so the transmitter and receiver face each other squarely and are at the same height. Tighten mounting screws.
• Shield from direct light: If sunlight or headlights hit the receiver, fit a small hood or shield (without blocking the beam) to reduce glare.
• Seal against moisture: Ensure cable entries are sealed and lenses are clean and dry. Replace cracked housings.