It goes partway down reverses direction and goes back up again.
Garage door keeps stopping and going back up.
A careless or rushed parking job can cause the car s bumper to block the sensor.
This brain can wear out in time so you could need a replacement.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
Your logic board needs replaced.
If these can t see each other when the door is almost shut it will send a signal to the garage door motor to open back up.
Sometimes there could be a box or a garbage can sitting too close to the eyes.
This requires a simple turn with.
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.
Other times it may be a leaf hanging from the bottom of your garage door.
Sometimes this switch can become loose to reconnect the operation of the door push the tab back up that you disconnected by pulling the cord down.
You push the button to close the garage door.
Get logic board replacement.
Your garage door s logic board is the brain of your garage door opener.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
Look at the photo eyes themselves if there are cobwebs or if there is dust on the lenses the eyes will sense this and cause the door reverse.
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.
Quite often the cause of your door s malfunction is an improperly set garage door limit.
A garage door that only opens halfway becomes a nuisance for many reasons.