Start with the safety sensors. Misalignment or blocked sensors are the most common cause.
- Verify the sensor indicator lights are on and solid.
- Test your keypad and remote for proper operation: 372 MHz keypad, 303 MHz keypad, 372 MHz remote, 303 MHz remote.
- Inspect the door tracks and rollers for obstructions or damage.
- Make sure the opener is not in lock or vacation mode.