Your garage door opens immediately after closing.
Liftmaster garage door opener goes down then back up.
Pull the emergency release handle down and back towards the garage door opener.
There are four common problems with garage door sensors three of these homeowners can fix.
Turn the down limit switch screw clockwise one turn with a flat blade screwdriver if the garage door closes and then begins to open back up.
It may be your garage door sensor.
To fix this issue and get your liftmaster garage door opener working again follow these troubleshooting steps.
Here s a rundown of some of the possible reasons this can be happening.
Your garage door opens when it hits the ground.
But one of the more perplexing issues is when the door goes up and down by itself with no help from you.
Possible reasons why your garage door hits the floor then goes back up.
The garage door goes down then back up.
Garage door only travels a little way and then reverses does your garage door only travel a little way 6 inches or so and then reverse.
It can seem quite ghostly having your garage door operate with a mind of its own.
Your travel down setting needs to be adjusted.
The garage door keeps going up and down.
This will disconnect the garage door opener from the door.
As is the case with so many issues at the home there s no one reason why your garage door closes then opens.
Set a safety ladder under the garage door opener.
To try and correct the problem make sure the eyes on the sensors are clean the wire connections are securely fastened at the sensors and motor head and the eyes are directed at each other.
If you re craftsman chamberlain etc garage door opener is closing and then opening up its likely a common problem related to the stop limit mechanism.
Locate the limit switch adjustment either on the back of the opener or behind the light bulb s lens cover.
The garage door will automatically go in reverse.
Also try unplugging the garage door opener and re plugging the unit back into the outlet.
Close the door with either the door control or the remote control.