Slip a c clamp through the track.
Garage door opener locked up.
This video will show you how for most garage door openers including liftmaster chamberlain sears.
It means you will have to find the model number but it helps.
This can be a quick fix by identifying the object and then removing it.
These things can leave you at the mercy of a lo.
Unplug the garage door opener.
Lodged garage door track.
This is related to the up limit switch.
Locate the force adjustment dials.
Remove the release lever cord.
T his is a pretty uncommon problem but one that can happen after you ve first installed your garage door opener.
Find a manual for trouble shooting.
It s important to get this switch at just the right distance from the motor so that the door is able to close all the way but the motor also knows to stop running.
With some garage openers a feature exists that allows you to put the opener in lock mode.
Your jammed garage door can be caused by something as simple as an obstruction in the track.
Some use a wedge to hold the gap open.
Try making small adjustments.
Check to see if anything a shovel broom etc fell and is now stuck in the track that is causing it to be lodged.
Here is a link that might be useful.
Garage door locked from the outside.
Ever forget your keys to the house or even lost your garage door remote.
Use a zip tie to secure the garage door in place.
If your garage door opener is locked check the wall control it may be set to vacation mode.
Keep the remote in the house.
The only thing i can think is that maybe the sensor has gone bad but they can be a pain to trouble shoot without one of their specialists.
Disable the release lever.
Every garage door opener has an emergency release that disconnects the door from the opener.
Use a padlock to lock the track.
Once locked a normal press of the button will not activate the door.
You can activate this feature by holding down the button on your keypad for several seconds.
They can be found at the back panel of your craftsman garage door opener to increase the open force turn the open force dial about 1 4 of a full turn similarly to increase the close force turn the close force about 1 4 of a full turn operate your garage door.
I have used it several times.
Lock the release lever.
By pushing the door inward to create a gap at the top a crook can insert a wire hook and fish for the release.
Without it you wouldn t be able to open the door when the opener is on the fritz.