The photo eyes send an infrared beam across the bottom of your garage door opening if that beam is broken the door will reverse.
Liftmaster garage door reverses after closing.
How to fix a garage door that keeps reversing.
My door willnt close all the way it reverses and opens.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
Chamberlain group cgi the corporate parent company to liftmaster chamberlain merlin and grifco is a global leader in access solutions and products.
An open door will not close if the infrared beam is broken.
The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction.
Liftmaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks.
This is almost always the result of a.
This brain can wear out in time so you could need a replacement.
Your garage door s logic board is the brain of your garage door opener.
Verify the safety sensors are properly installed aligned and free of any obstructions.
When the garage door opens about halfway or 5 feet from the ground and stops the up limit switch needs to be adjusted.
Liftmaster garage door opener won t close door.
It goes partway down reverses direction and goes back up again.
We design and engineer residential garage door openers commercial door operators and gate entry systems.
I even tried holding the door push button down in the closed position.
Open the garage door and watch it closely as it opens.
Troubleshooting a liftmaster opener with a flashing light involves inspection of the safety reverse sensing system.
My door will not close and the light bulbs blink.
To prevent the garage door from injuring someone in the door or damaging an item in the way of the door all models of liftmaster garage door openers come installed with a safety sensor.
I have a steady amber and green indicating light on my sensors.
You push the button to close the garage door.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
Repeat safety reverse test after adjustments.
It still would open.
Review adjustment step 2.
This is a safety feature that has been added to garage door openers to help prevent the door from closing on a car pet or even a child.