This is almost always the result of a dirty or obstructed safety feature.
Garage door shuts then opens.
Here s a rundown of some of the possible reasons this can be happening.
As is the case with so many issues at the home there s no one reason why your garage door closes then opens.
If it closes only partway the safety sensors are usually responsible clean the lenses or realign them and make sure there are no obstacles blocking the beam.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
You push the button to close the garage door.
When your liftmaster garage door opener opens and closes by itself here are the troubleshooting tips you need to follow.
They are misaligned this is the most likely problem and the most common issue with garage door openers.
Your travel down setting needs to be adjusted.
If the door closes while holding the button pressed you are likely having one of the following issues with your safety sensors.
These limits set the distance the door will open or close before stopping.
If this solves the problem then the control station is faulty or there is a short circuit in the wire.
The solution is usually one or more of the following.
Disconnect the control station.
In the down direction if the limit is set beyond the point at which the door closes fully the door will hit the floor and act as if it is hitting something and the safety feature tells it to reverse.
It goes partway down reverses direction and goes back up again.
This is not a common problem at all but it could happen.
There may also be loose wire connections inside the button housing itself.
Remove the bell wire from the single button control station s terminals and operate the garage door opener from the remotes.
Open the garage door and watch it closely as it opens.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
As these wires short against the housing the electrical impulse causes the door opener to activate.
The sensors are dirty wipe lenses with a clean soft cloth.
The symptom of this is a garage door that is in constant motion opening fully then immediately descending only to start the same cycle again.
Your garage door is programmed to travel a certain distance before it closes.
If your garage door won t open or close the problem could be a bent track a broken torsion spring or a bad capacitor int he motor housing.
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.
You have an open limit and a close limit on your garage door opener.
