​​​​​​​​​​​​​​​​​​​​​​​​​​The Self-Diagnostic Safe-T-Beam® System alerts homeowners of improper installation or malfunctions with its new self-diagnostic feature. With this system, a closing door will be reversed automatically when objects pass through its infrared beam. Plus, by using its red and green LED indicators, our new system will send a self-diagnostic code to help you quickly identify problems and solutions.​