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Why Is My Liftmaster Blinking?

Maya Lin-Takahashi • • 5 min read
Why Is My Liftmaster Blinking?
Troubleshooting a LiftMaster opener with a flashing light involves inspection of the safety-reverse sensing system. LiftMaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks. The main light will blink 10 times, indicating a problem.

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Furthermore, how do I reset my LiftMaster garage door opener?

How to Reset a LiftMaster Garage Door

  1. Press and release the "learn" button on the opener's motor unit.
  2. During those 30 seconds, press down and hold the "learn" button on the handheld remote control you want to use to operate the garage door.
  3. When the motor unit's light begins blinking, release the remote button.

Also, why is my garage door opener button blinking? The most common reason for the lights to flash on the garage door opener and the door not closing is that the safety reversing sensors are misaligned or obstructed; this is a safety feature of the garage door opener. One (1) flash indicates the sensor wire is shorted.

Beside above, what does a blinking light on a garage door opener mean?

The blinking opener lights indicate that the safety sensors are likely blocked or out of alignment. Defective safety sensors or faulty sensor wiring also cause the opener lights to blink 10 times. The safety sensors use an invisible beam of infrared light to detect obstructions in the garage door's path.

How do you align sensors on a garage door opener?

How to Align Safety Sensors On Your Garage Door

  1. Remove the receiving sensor (green light) from bracket. You can do so by taking off the wing nut.
  2. Point the sensor away from the sending sensor, so that the light is completely off.
  3. Once the light is off, wait 10 seconds.
  4. Slowly rotate sensor back, aligning sensor with sending sensor, until it lights up green again.
Related Question Answers

Can you bypass garage door sensors?

If your sensors or garage door motor is blinking or your door doesn't close, it's a sign you could have faulty sensors. Luckily, you can set most automatic garage doors to a manual mode to bypass the sensors. You can also disconnect the sensors altogether, but doing this will prevent most garage doors from working.

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

If the door goes up but goes down only when you hold down the wall switch, check to see that the safety sensors are in alignment. The small light on each sensor should be lit up when nothing is between them. Door sensors do go bad, so if no light is showing at all, you may need to replace them.
Maya Lin-Takahashi
Author

Maya Lin-Takahashi

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.