Door starts to close, then stops and opens when the sun is shining directly on one of the sensors.

Safety first: Maintain full functionality of safety beams; do not tape over or bypass them.

• Shade the sensor: Install a small sun shield or hood above the receiver sensor (often the one with the flickering LED) to block direct sunlight.
• Re‑align sensors: Fine‑tune alignment to maximize signal strength; the LED should be solid even in bright conditions.
• Adjust mounting height/angle: Slightly angle the sensors away from reflective surfaces like shiny floors.
• Test at different times of day: Confirm reliable operation when the sun is at problematic angles.