However, if there’s damage to your door, like a dent from a car bumper, you may be able to replace the door only and save the cost of the motor, rails, and sensor. If your garage door is 15 or 20 years old and you’re noticing issues with the motor, sensors, and overall appearance, it’ll likely make more sense to replace the door than to replace or repair all the individual parts. The best choice for you when it comes to repairing or replacing your garage door will come down to the issue. If your troubleshooting efforts haven’t fixed the issue, it’s time to call in the pros. A wiring malfunction - If you’ve checked that the sensors are both clean, aren’t being blocked, and are properly aligned, but you’re still not seeing lights on both sensors, there might be an electrical or another mechanical issue. If they are, use a screwdriver to tighten them back up, and this might solve your alignment problem without having to call a pro. Check and see if the mounting brackets for your sensors are loose. If the brackets holding the sensors have come loose over time, it may cause the sensors to lose their connection. If something breaks the path of light between the sensors, your garage door will stop lowering. Misalignment of sensors - Your garage door sensors work when the lights on both sensors line up.If your sensors aren’t working, check them to ensure they’re clean first. Due to their necessary location, sensors collect dirt and dust over time and can potentially be blocked by leaves or twigs that make their way in. Debris blocking the sensors - Garage door sensors sit close to the ground to prevent the door from closing if there are pets, people, or other items in its path.Here are the most common reasons why your sensors might not work: Some issues may require that the sensor be replaced altogether, but others can be a quick fix. Garage door sensors are subject to wear and tear over time, so if your sensors are old, it may be time to have them replaced and updated. There are several reasons why your garage door sensors might malfunction.
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