Garage Door Keeps Opening After Closing

A garage door that keeps opening after closing can be a frustrating and potentially dangerous problem. There are several possible causes for this issue, ranging from faulty sensors to mechanical problems. If you are experiencing this problem, it is important to troubleshoot the issue and determine the cause in order to fix it.

One of the most common causes of a garage door opening after closing is a misaligned sensor. Garage doors have two sensors, one on each side of the door, that detect when the door is closed. If one of these sensors is misaligned, the door may not be able to detect that it is closed and will continue to open. To check the alignment of the sensors, first locate them on either side of the door. Then, close the door and observe the lights on the sensors. The lights should be lit and facing each other. If one of the lights is not lit, or if the lights are not facing each other, the sensor is misaligned and will need to be adjusted. To adjust the sensor, loosen the screws that hold it in place and move it slightly until the lights are lit and facing each other. Once the sensor is aligned, tighten the screws to hold it in place.

Another possible cause of a garage door opening after closing is a faulty sensor. If one of the sensors is damaged, it may not be able to detect when the door is closed and will continue to open. To check the sensors, disconnect the wires from one of the sensors and then close the door. If the door stays closed, then the sensor is faulty and will need to be replaced. To replace a sensor, loosen the screws that hold it in place and remove it. Then, connect the wires to the new sensor and mount it in place. Once the new sensor is installed, close the door and test it to make sure that it is working properly.

If the sensors are not the cause of the problem, then the issue may be mechanical. One possibility is that the springs that lift the door are worn out or broken. When the springs are worn out, they may not be able to lift the door all the way up, which can cause the door to open after closing. To check the springs, open the door and look for any signs of wear or damage. If the springs are worn out, they will need to be replaced. To replace the springs, disconnect the door from the opener and then remove the springs. Then, install the new springs and reconnect the door to the opener. Once the new springs are installed, test the door to make sure that it is working properly.

Another possible mechanical problem is that the door is not properly balanced. When the door is not balanced, it may not open and close smoothly, which can cause it to open after closing. To check the balance of the door, open the door halfway and then let go. If the door stays open, then it is not balanced. To balance the door, adjust the tension on the springs. To increase the tension, turn the adjustment screws clockwise. To decrease the tension, turn the adjustment screws counterclockwise. Once the door is balanced, test it to make sure that it is working properly.

If you have tried all of the above troubleshooting steps and the garage door is still opening after closing, then the issue may be more complex. In this case, it is best to contact a qualified garage door repair technician to diagnose and fix the problem.