Two possible problems can lead to a garage door reversing before it even touches the floor.
Chamberlain garage door opener won t stay closed.
Find the chamberlain garage door opener technical support you need to get your garage door opener operational.
Garage door reverses before hitting the floor.
If you could provide me with the make and model of your garage door opener i should be able to get you a specific answer about your garage door not staying closed.
Open the garage door and watch it closely as it opens.
If you ve got a chamberlain liftmaster or craftsman garage door opener.
This prevents the motor inside the opener from overheating and eventually breaking down.
The garage door won t open fully.
From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.
This quick video will tell yo.
When the garage door opens about halfway or 5 feet from the ground and stops the up limit switch needs to be adjusted.
You just need to adjust the travel setting.
Adjusting the limit travel setting.
As you suggested you likely just need to adjust the down limit travel or the closing force.
Chamberlain garage door openers are equipped with a safety feature that halts the opener when it encounters resistance or obstruction.
It s time to investigate the problem.
How to adjust a garage door opener s travel setting when the garage door won t close all the way adjusting the travel.
When it hits the floor does it go back up.
You don t need a new garage door.
Trouble shooting a garage door that won t stay closed.
However if the door continues to bounce back open after rotating the screw four or five complete turns you could have a damaged limit switch assembly.
Amberstburg on canada question.
Garage door openers have an adjustment screw that controls the closing force the pressure with which a door is allowed to descend before the motor switches off when the door reverses before it even hits the floor this is often because the close force.
Garage door won t stay closed.
There can be a few reasons as to why your garage door won t stay closed and by doing some snooping and checking a few parts of the garage door system you ll be able to see what s really going on.