Place a stepladder beneath the box portion of the garage door opener.
Setting garage door to manually opening.
If the door simply stops short of the floor the likely culprit is the down limit switch.
This disengages the electric drive from the door and you can manually open and close it.
This emergency release cord will be attached to the trolley in the center of the garage door.
It makes the door operate quiet and makes the chain and all.
Keep the rollers and chain lubricated on your garage door.
Many electronic garage doors come with a bypass switch allowing you to override the system and manually lift it open when needed.
To locate the bypass switch look for a red rope hanging down from your garage mechanisms.
To manually open most garage doors you simply pull a corded handle that is attached to the door.
Keep your owner s manual on hand.
Diagram of garage door engaged and disengaged to screw drive opener system.
Have a helper steady the ladder.
Consult it first before tinkering with your door.
This will reengage the door to the opener system and now the only way to open and close your garage door would be with the power of your opener unit.