Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.
How to fix a garage door that will not close.
One of them may be slanted toward the door and binding it.
Depending on the brand.
There should be 1 2 to 3 4 inch of.
Garage door won t close completely if your garage door isn t closing all the way but also doesn t reverse you might need to adjust something called the limit switch.
On the switch pad located on the wall press and hold the pressure plate for a few seconds.
First check the sensor lights.
If you ve tried everything listed above and your garage door still won t go down you can try to force it to close.