Garage Door Sensor Repairs

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Have you ever had the experience of standing at your garage door, pushing the garage door opener button to open it, only to find that your garage door won’t close? It could be time to check your garage door sensors. A garage door is an important part of your home security, and garage door sensors are key components that help keep it in working order. These safety sensors detect when someone or something is obstructing the door from closing and stop the door from coming down. Unfortunately, these safety sensors can malfunction or break down over time, rendering them unable to do their job properly.

At Thompson Garage Doors, we offer a variety of services to repair or replace malfunctioning garage door sensors. Our experienced technicians can diagnose the problem and determine if a simple adjustment will do the trick or if a full replacement is needed. We have a variety of replacements available to fit the type of garage door you have.

Garage Door Sensor Adjustment

Garage Door Sensor Adjustment

If your sensors appear to be in good condition but still aren’t working properly, our technicians can adjust them for you. This involves making sure that the sensor lenses are aligned properly and that there is nothing obstructing their view of each other. If these adjustments don’t work, then it may be time to replace the photo eye system.

Checking the LED lights on the garage door will show the correct function. One of the small LED lights should be green, while the other should be red. The green LED light sends light out, and the red LED light receives light. If you see a red blinking LED light, then the sensor is wrongly aligned. The sensor can be pulled out of position easily, especially when there is much activity in our garage. Oftentimes, garages are used for work or storage, and misalignments can happen.

If you want to check to see if you can troubleshoot the issue yourself, the first step in fixing your broken garage door sensors is diagnosing what exactly is wrong with it. To do this, you need to understand how the sensors work – they send an infrared beam between each other that must be intact for the door to operate correctly. If one of these sensors is blocked or malfunctioning, then the infrared beam will be disrupted and won’t register properly on the other end. This will cause your garage door opener to not function properly.

Garage Door Sensors Replacement

Garage Door Sensors Replacement

In some cases, it may be necessary to replace one or both of your garage door sensors with new parts. We carry a wide selection of replacements for all types and brands of garage doors so you’re sure to find what you need. Chamberlain and LiftMaster garage door sensors can be used for most common residential garage doors. Our technicians will install the parts quickly and efficiently so that your door is back up and running within the same day.

Common Opener Problems and Fixes

Sometimes minor issues with your opener itself could cause sensor malfunctions as well. Before calling us for service, try out some simple fixes such as checking the batteries on your remote control or replacing worn-out parts like cables yourself first.

There are a few easy steps that can help get your sensors back up and running again in no time. First, make sure both sensors are clean and free of debris or dirt that could obstruct the infrared beam from reaching its target. You should also check their alignment – if they’re not lined up correctly, they won’t be able to detect each other’s beams properly either. Finally, make sure both sensors are securely mounted on their brackets and that all wiring connections are secure as well.

If all of these steps don’t help fix your problem, then you may need to replace one or both of the sensors completely. You’ll want to disconnect any power source from the sensors before replacing them with new ones, and attach each new sensor’s wiring harnesses according to the instructions provided (usually there will be a red wire for one side and a white wire for the other). Finally, mount each new sensor securely onto its bracket and test to make sure they are working. In the event they are not, you can feel confident in reaching out to the professionals at Thompson to help assist you with this issue and get your sensors working or replace them with new sensors.

Things you can do

  • Check alignment
  • Clean sensors
  • Check mounting
  • Check for worn-out power cables
  • Check remote batteries
  • Replace sensors if needed


How do I know if my garage door sensor is bad?

You can simply place something in front of one of the sensors while the garage overhead door is open. If the garage door closes and does not open back up, you will know that the garage door sensor is bad.

How much does it cost to fix garage door sensors?

Typically, between parts and labor, you could expect to pay $150-$200 to repair garage sensors.

Why is one garage door sensor green and one red?

These sensors are indicators of the garage door sensors’ status. The green line indicates power is being supplied, and the red light indicates that there is nothing obstructing the sensors and they are able to see one another.

Why would garage door sensors stop working?

Sensors must be aligned with one another, and must be connected correctly into garage door systems. According to LiftMaster, safety sensor wires usually have bad connections due to incorrect connection wires and a wire that is damaged in a staple.

Reach Out Today – Garage Door Sensors

Your garage door serves as a great convenience when it is functioning properly, but can become quite annoying when something goes wrong with them, especially when they stop working due to faulty garage door sensors. Fortunately, broken garage door sensors aren’t difficult tasks even for those who aren’t particularly handy or knowledgeable about home repairs – all that’s needed is some patience and understanding of how these systems work, and you can successfully get them functioning correctly again. When all else fails or you need help with installing new garage door sensors, Thompson is here to help. Contact us at 775-356-6601 for questions about any of your garage needs.


Thompson Garage Doors is here to help you 24 hours a day, seven days a week, 365 days a year. When you call after our normal business hours, your call will be transferred to one of our Emergency Service managers, who will dispatch a service person and a fully-equipped service vehicle to make the repair or secure your building so your property stays protected.

171 S. 18Th Street, Sparks, Nv 89431


“Find Out Why Thompson Garage Doors is the Best Choice”

At Thompson Garage Doors, we are committed to providing the highest quality door repair services to keep your doors functioning at their best. We also stand behind our work. If you have any issues, simply reach out. But this is not the only reason to choose us.

Here are a few other reasons why you should choose us for all of your door repair needs:

24-hour door repair service
Emergency door repair service
Same day delivery and installation
thompson employee working on garage door. emergency services are available 24 hours, 7 days a week
Efficient and timely service
Years of experience in repairing all types of doors
Competitive and transparent pricing

All you have to do is give us a call. Our team will reach your location and send you a free estimate after the survey. We can start the work as soon as we have your approval.


Don’t let a broken door disrupt your home life! Get yours back in top shape with our professional door repair service. Our expert technicians are ready to handle any door repairs, big or small. Let’s connect for fast, reliable commercial and residential door repair services.

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