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.
Garage door keep open up immediately after closed.
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.
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.
Your garage door s logic board is the brain of your garage door opener.
This is almost always the result of a dirty or obstructed safety feature.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
This brain can wear out in time so you could need a replacement.
Other times it may be a leaf hanging from the bottom of your garage door.
Open the garage door and watch it closely as it opens.
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.
When the garage door immediately leaps upward after touching the floor this too is a close limit switch problem.
Stress on the door.
In the fully open or fully closed position the garage door s system is under the least stress from spring tension.
Adjust the close limit adjustment screw on the door opener motor in small increments until the door stops upon touching the floor.
Sometimes there could be a box or a garbage can sitting too close to the eyes.
It passes a beam a few inches off the floor from side to side.
Garage door reverses immediately after touching the floor.
Your logic board needs replaced.
As these wires short against the housing the electrical impulse causes the door opener to activate.
Get logic board replacement.
Since leaving it fully open isn t a safe idea unattended homeowners who leave the garage up just a few inches may vent some air but are overall adding to the strain on the door system decreasing its lifespan.
At the bottom of your door there s a small infrared sensor.
When the garage door opens about halfway or 5 feet from the ground and stops the up limit switch needs to be adjusted.