If your garage door opener is locked check the wall control it may be set to vacation mode.
Garage door opener locked up.
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.
This can be a quick fix by identifying the object and then removing it.
Use a zip tie to secure the garage door in place.
Lock the release lever.
Garage door locked from the outside.
This video will show you how for most garage door openers including liftmaster chamberlain sears.
Disable the release lever.
Some use a wedge to hold the gap open.
Use a padlock to lock the garage door from the inside.
Here is a link that might be useful.
To open it up all you need to do is thread a coat hanger or hooked piece of wire through the top of the door and open the emergency latch which can also be done by the rope many emergency latches.
I have used it several times.
These things can leave you at the mercy of a lo.
How to lock your garage door.
Unplug the garage door opener.
Locate the force adjustment dials.
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.
Remove the release lever cord.
With some garage openers a feature exists that allows you to put the opener in lock mode.
Use a padlock to lock the track.
Ever forget your keys to the house or even lost your garage door remote.
This is related to the up limit switch.
Every garage door opener has an emergency release that disconnects the door from the opener.
Once locked a normal press of the button will not activate the door.
Without it you wouldn t be able to open the door when the opener is on the fritz.
Slip a c clamp through the track.
Find a manual for trouble shooting.
Try making small adjustments.
It means you will have to find the model number but it helps.
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.
Lodged garage door track.
Check to see if anything a shovel broom etc fell and is now stuck in the track that is causing it to be lodged.
T his is a pretty uncommon problem but one that can happen after you ve first installed your garage door opener.
Keep the remote in the house.