How To Fix Liftmaster error code 4-6?

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Last Updated on July 22, 2023

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Liftmaster Error Code 4-6

Liftmaster acts as a great tool when you want to automate your garage doors. This is an advanced technology device as you can see in real-time what the device is efficiently doing and if there are any issues on the device.

The issues on Liftmaster should always be solved on a priority basis because they help operate a heavy piece of machinery and if that malfunctions, it could be trouble for many people involved.

Safety hazard of such high caliber is not warranted.

In this article, we will discuss the Liftmaster error code 4-6. This error code shows up when there is trouble in the application of the sensors of the device. It means that the sensors on the garage door are misaligned.

We will discuss the solutions for the sensor trouble on Liftmaster in the next section.

How to solve the Liftmaster error code 4-6?

As we now know that the error code 4-6 means that the sensors on the garage door are misaligned, we should immediately look into the solutions.

This is because if the sensors are not correctly placed, they will not signal you about the other issues on the garage door.

Here is how you can take care of this problem.

Fix 1: Check for obstructions on the sensors

The sensors on the garage door are located on either side of the door. They need no obstructions to be between them and the connecting hinges on the wall so that they can sense any potential problems.

The first thing that you should do when you receive this error code is, you should physically get to the door and check for any obstructing pieces of random materials that could be blocking the sensors.

If you find anything, remove it and then see if the error code is still displayed.

Fix 2: Check the LED function on both the sensors

The sensors communicate issues through the LED lighting and you can also check for the normal functioning of the garage door through the LED light function.

Here is how you can do this in easy steps.

  • Locate the sensors on the garage door. They are present on either side of the door.
  • There is a wing nut in the front of the sensor, loosen the wing nut.
  • Now change the alignment of the lenses of the sensor so that they are pointing at each other. This is the ideal placement for the sensors.
  • Now you will notice the LED light to be showing a steady glow. This is the time that you should tighten the safety nut.
  • If you see that both the LEDs are glowing steadily, this means that the sensor is functioning properly.
  • Try using the remote again and check the functions of the device.

If this does not help, then you have one more option to try before you have to contact a technician.

Fix 3: What to do if the above step does not work?

The above step makes sure that the alignment of the sensors is changed and then LEDs are monitored to see if the device works.

If the above step did not work for you, the only option you have is, to readjust and realign the sensors repeatedly unless you find the exact position where they are in the position to work.

This might take some time but it is worth it in the end.

Fix 4: Contact a technician through official support

If nothing has worked for you and it has been hours that you have been rearranging the garage door sensors, it is time that you contact the Liftmaster support team.

They will send in a technician to analyze the real issue on the device and walk you through the solutions on it. 

To conclude

Liftmaster helps operate a heavy piece of machinery and you cannot afford to go wrong with the installation of this device.

We have made sure to include the solutions that are easy for you to apply but we will still suggest that you take a look at calling in the technician if you are not sure. It always helps and saves you precious time.

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Falguni Rana is a technology writer who has expertise in software and hardware troubleshooting. He publishes how-to and troubleshooting guides for different apps, websites, games, and consumer hardware products.