There are several reasons why you may have to pull the cord thereby disengaging the garage door from the opener.
Garage door release cord not working.
Tie an overhand knot to secure it.
If simply hitting the button does not work you will have to take more action.
You need to check the release handle and make sure that it is on the track.
The next step is to go to the inside of the garage door.
Once released you have to manually open and close the door until you re engage it.
The release cord on your garage door is a very important safety and security feature.
The emergency release cord is the red rope that hangs from the door trolley.
The good news is turning off the release is as easy as turning it on simply pull the cord again hit your garage door remote and your garage door should pop right back on track.
Pulling that cord disengages the garage door from the motor so your garage door would essentially be manually operated while the release is on.
Work with the door down.
Pull the emergency release cord.
You might have to do this if the opener malfunctions or loses power.
The first thing to do is hit the door button.
If your chamberlain garage door opener trouble is a broken door spring and you pull the emergency release cord while the door is in the raised position the door could come crashing down.
That way you won t lose a finger if your unsuspecting housemate hits the remote button while you re working.
Pull the end through until the handle is six feet above the floor.
Some units will actually reconnect themselves but this is not typically the case.
Feed the other end of the cord through the emergency release lever on the door opener.