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Monitoring and inspecting the photo eyes is the best place to start when troubleshooting. Unfortunately, several things can also cause them to falsely signal that an obstruction in the door path. Also called photo eyes or safety beams, these devices alert the opener to stop and reverse when something trips the sensor. Store items in the garage away from the photo eyes and encourage children to stay away from the beams when playing.Ī garage door that reverses in the opening is most commonly caused by malfunctioning safety sensors. Contact over time will damage the plastic casing, wiring and internal parts. Safety eyes also tend to get hit by childrens toys, tools and trash cans. This is especially a concern for cold and rainy climates where snow, ice and heavy rainfall occur. When water gets inside the casing the internal components go bad. Since photo eyes are installed on the vertical track 4-6 inches off the floor they come into contact with moisture. Safety beams should last as long as the opener if they aren’t hit or overly exposed to moisture.
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Most garage door openers usually last between 10-20 years, but several components like safety beams can break faster. This method was originally designed for door operation during power outages, but can also be used for stubborn openers that won’t close the door. Then you can manually close the door by hand by pulling it down. Pull the red release cord until the trolley disengages. Note: Pressing and holding the remote transmitter or keypad won’t work – only the wall control button.Ī second object includes disconnecting the garage door opener trolley from the door. Holding the wall button down overrides the safety reverse system. Then press and hold the wall button until the door closes completely then release the button. Make sure nothing is in the path of the opener or stuck in the track. If you can’t get your garage door to close with the opener you still have a few options. Defective photo eyes, loose wiring or obstructions in the door path can cause the opener to flash 10 times. This diagnostic code system was created for all Chamerlain Liftmaster openers, but varies by manufacturer.Īn opener light that blinks 10 times means the safety eyes are blocked, blinded or out of alignment. The number of blinks, clicks and light bulb flashes corresponds to a specific problem. Garage door openers have built in troubleshooting codes to help you diagnose what is wrong. If more force than usual (excessive) is needed to close the door it will also reverse back up to prevent crushing the obstruction. If the safety eyes fail to work the maximum force sensor serves as a backup. This is likely due to the safety eyes being blocked, the maximum force sensor being activated or an obstruction actually in the door path.īlocked photo eyes trigger the door to reverse for safety reasons – preventing a small child or animal from being crushed under the door. Overhead doors start down and reverse back up when the opener thinks their is an obstruction in the way.