Customer Issue: Misaligned safety sensors.
Our Solution: We first checked to make sure the sensors' lenses were fine, which they were. It was just a matter of correcting their alignment so that they would allow the door to close. After we completed this task we tested the door and the problem was gone.
Garage Door Troubleshooting
Customer Issue: Unbalanced garage door.
Our Solution: We checked the condition of the lift cables and the adjustment of opener's travel limit switch to rule them out first. Then we proceeded to adjust the extension springs and that had solved the problem. The door returned to its properly balanced state.
Customer Issue: Rusty tracks.
Our Solution: We examined the door and its rollers to rule them out as possible culprits. The problem was, in fact, with the vertical tracks, as they had become quite severely rusty. We removed them both and installed new ones of matching specifications in their place.