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One Garage Door Sensor Light is Yellow And The Other is Green

Garage door sensors play a crucial role in the safety and functionality of your garage door. Most homeowners have encountered the common scenario where one garage door sensor light is yellow, and the other is green. In this comprehensive guide, we will delve into what these colors mean, why they are important, and how they contribute to the seamless operation of your garage door. Tomys Garage Door, your trusted partner in garage door solutions, offers insights and expert advice in this domain.

The Importance of Sensor Lights in Garage Door Safety

Garage door sensors are safety devices that prevent the door from closing if an object or person is in the way. They are a critical component of your garage door system, ensuring the safety of your family and pets. These sensors usually consist of two units placed on either side of the garage door, close to the ground. One sensor emits a beam (light source), while the other sensor receives it.

Why One Light is Yellow and the Other is Green

Sensor Light Color Function Description
Yellow Emitter The sensor emitting the beam is usually indicated by a yellow light.
Green Receiver The sensor receiving the beam is typically indicated by a green light.

The different colors help in quickly identifying which sensor might need attention during troubleshooting or maintenance.

Common Issues and Solutions

Alignment Problems

Misaligned sensors are a frequent issue. If the green light is blinking or off, it might indicate an alignment problem. Gently adjust the sensors until the green light is stable and bright.

Dirt and Obstructions

Dirt on the sensors can block the beam. Clean the lenses with a soft cloth. Also, remove any objects that might obstruct the beam’s path.

Wiring Issues

Check for any damaged wires or loose connections. Wiring problems might require professional assistance.

Why Choose Tomys Garage Door

At Tomys Garage Door, we prioritize safety, efficiency, and customer satisfaction. Our team of experts is equipped with the knowledge and tools to address any garage door concerns. We offer prompt and reliable services, ensuring your garage door operates smoothly and safely.

Frequently Asked Questions

What does it mean if both lights are off?

If both sensor lights are off, it could indicate a power issue. Check the power supply and circuit breaker. Also, inspect the sensors for any visible damage.

Can I bypass the sensors?

Bypassing the sensors is not recommended. It’s a crucial safety feature. For temporary solutions, consult a professional.

How often should sensors be maintained?

Regular maintenance, ideally twice a year, is recommended. This includes cleaning, realignment, and checking for wear and tear.

What should I do if realignment doesn’t fix the issue?

If realignment doesn’t resolve the issue, the sensors might be faulty. Consider replacing them or contact a professional for assistance.


Understanding the functionality of your garage door sensors is key to maintaining a safe and efficient system. Remember, the yellow and green lights are not just indicators but guardians of your garage’s safety. For any garage door maintenance, installation, or advice, turn to Tomys Garage Door. We are dedicated to providing top-notch service and expert solutions. Explore our service areas, learn about our services, understand who we are, and browse our resourceful guides on installing weather stripping, garage door installation timelines, and more. For any garage door needs, contact us at Tomys Garage Door, where safety and quality meet.

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