Why Is My Garage Door Not Closing And Blinking?

Why is My Garage Door Not Closing? Casella Garage Doors
Why is My Garage Door Not Closing? Casella Garage Doors from www.casellagaragedoors.com


Having a malfunctioning garage door can be frustrating, especially when it refuses to close and starts blinking. This issue can disrupt your daily routine and compromise the security of your home. Understanding the possible reasons behind this problem can help you troubleshoot and fix it effectively. In this article, we will explore some common causes of a garage door not closing and blinking.

1. Sensor Misalignment

One of the most common reasons for a garage door not closing and blinking is sensor misalignment. Garage doors are equipped with safety sensors on each side of the door near the floor. If these sensors are not properly aligned, the door will refuse to close. Check if the sensors are facing each other and not obstructed by any objects. Clean the sensors with a soft cloth to remove any dirt or debris that may be blocking the signal.

2. Sensor Obstruction

Another reason why your garage door is not closing and blinking could be an obstruction in the sensor’s path. The safety sensors detect any object or person in the door’s way and prevent it from closing to avoid accidents. Check for any objects, such as tools, toys, or debris, that may be blocking the sensor’s path. Remove the obstruction and try closing the door again.

3. Power Interruption

A power interruption can also cause your garage door to stop functioning properly. Check if the power source to the garage door opener is working correctly. Ensure that the power cord is plugged in securely and that there is no power outage in your area. If the power source is fine, try resetting the opener by unplugging it for a few minutes and then plugging it back in.

4. Remote Control Issues

If your garage door is not closing and blinking, the problem may lie with the remote control. Check the batteries in the remote and replace them if necessary. Ensure that the remote is within range of the opener and that there are no obstructions between them. If the remote control still doesn’t work, try reprogramming it according to the manufacturer’s instructions.

5. Limit Switch Problems

The limit switch controls the travel distance of the garage door. If the switch is not set correctly, it can prevent the door from closing. Check if the limit switch is properly adjusted. Consult the owner’s manual or contact a professional for guidance on how to adjust the limit switch correctly.

6. Door Track Obstruction

An obstruction in the door track can also cause the door to refuse to close and start blinking. Inspect the tracks for any debris, such as leaves, dirt, or small objects, that may be preventing the smooth movement of the door. Clean the tracks thoroughly and remove any obstructions to ensure proper functioning.

7. Broken Springs

Broken springs are a common issue that can prevent the garage door from closing. If you hear a loud noise or notice that the door is not balanced when closing, the springs may be broken. Broken springs are dangerous and should only be replaced by a professional. Contact a garage door repair service to inspect and replace the springs if necessary.

8. Faulty Garage Door Opener

If none of the above solutions work, the problem may lie with the garage door opener itself. Over time, the opener may develop faults or wear out, causing it to malfunction. In such cases, it is best to seek professional help. A trained technician can diagnose the issue and recommend the appropriate repairs or replacements.


A garage door not closing and blinking can be a frustrating problem to deal with. By understanding the possible causes behind this issue, you can troubleshoot and fix it effectively. Start by checking for sensor misalignment, obstructions, power interruptions, and remote control issues. If the problem persists, consider adjusting the limit switch, inspecting the door track, or contacting a professional for help. Remember, safety should always be a priority when working with garage doors, so don’t hesitate to seek professional assistance if needed.