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.
Garage door stops short of closing.
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.
How to troubleshoot a garage door that stops halfway down.
Perform the safety reversing test after adjusting the travel limit.
The up limit switch may need to be moved toward the motor unit.
At this point you have to tweak the down travel adjustment dial till the garage door fully closes without reversing.
To do this place a 2 x 4 piece of wood under the garage door.
Close the garage door.
Check the tension spring to make sure it hasn t broken or stretched.
They can only open it.
When the garage door ascends correctly but stops short it is fully open these are the likely causes.
Then disconnect the opener from the actual door by pulling on the release rope.
They are usually on the motor housing and you access them by opening a panel or removing the housing cover.
Garage door openers make life convenient.
In most garage door openers there s a default setting to tell the garage door how far to close.
At least that s the theory.
How to adjust a garage door to close completely.
When the invisible beam path is obstructed or misaligned while the door is closing the door will stop or reverse.
This switch is usually a simply touch lever mounted on the end of the track near the motor unit and if it is too far away the motor will stop the door before it fully opens.
When this happens your garage door will only close by holding down on the wall button until the door fully.
The garage door runs along a track and if something even something teeny tiny falls onto that track the garage door can get caught up on it.
Close the garage door.
A garage door that only opens halfway becomes a nuisance for many reasons.
It may be as simple as the floor limit switch getting hit incorrectly.
You ll never need to step outside to get your car in or out of the garage again.
If the door is already open it will not close.
If the garage door reverses repeat step 2 and 3.
This can be improperly set upon installation or slowly drift away from the original setting over time.
Most garage door openers have an open and close limit control.
Check the track for any obvious objects.
If the setting is too high the garage door will stop short of the actual ground.
If your garage door is stopping before it meets the floor watch this video for the fix.