Check that both sensor lenses are clean and free of dust, dirt, or cobwebs
Make sure both sensors are aligned and facing each other directly
Confirm both sensors are mounted at the same height
Tighten any loose sensor brackets or mounting screws
Inspect the sensor wires for cuts, frays, or loose connections
Reconnect any loose wires at the opener and sensor terminals
Replace damaged sensor wiring if needed
Check for sunlight or bright light hitting the sensors
Remove any objects blocking the sensor path
Verify the sensor indicator lights are on and steady
Reset the garage door opener if needed
Test the door after each adjustment
Replace faulty sensors if the problem continues
Call a garage door technician if the issue is not resolved