This can happen if a track is accidentally struck by a heavy object and bent outward.
Garage door opener humming not lifting.
The next step is to attempt to open your garage door manually.
Is it all the way in the up open position.
Look at it closely i ll bet it is jammed against the 5 16 bolt just in front of the motor unit.
The motor pulley drives the belt to move the trolley along the rail to lift and lower.
If your liftmaster garage door is stuck and won t open it is possible to troubleshoot it in a variety of ways.
This indicates that something in the opener system has malfunctioned.
When a roller on the garage door comes off one of the side tracks the opener won t be able to lift the door.
If so loosen the chain adjuster until it is no longer jammed against the bolt run the opener down a few inches and then unplug it.
If you are able to raise your garage door easily it is not the problem.
A professional garage door technician will be able to tell you whether it is best to replace the opener or repair the old one.
Detach the opener by pulling the emergency handle downward.
If your chain drive garage door opener motor runs but the garage door won t move the drive and worm gears might be stripped or worn.
In most cases the cause will be a stripped gear or a chain that has come off the sprocket.
Fortunately resolving many of these problems can be done safely by the layperson and doesn t require specialized tools.
Because it hums when you try to open it the battery is working properly.
If this is the case the motor will run but as the chain isn t where it should be it can t generate the lift to open the door.
This will determine if the issue is connected to the door itself or the opener.
Doors can get stuck due to problems with their power source photo eyes and track alignment among other things.
Do you have a chamberlain or liftmaster garage door opener that won t close and the garage door is stuck open.
Not the garage door the opener trolley.
There s something wrong with the garage door opener that s stopping it from opening the door for you.