I released the safety handle but the chain drive is still jammed.
Garage door chain too far forward.
Both adjustment types should be done with the door closed and disconnected from the opener using the emergency release.
Try replacing the batteries in the remote and trying again.
I ve got one exactly like that a liftmaster 1 3 professional with a chain drive but it s 14 years old.
If the chain was installed too tightly on the garage door opener it can make opening the door more difficult for the automatic opener.
This could cause damage to anything under the garage door including yourself as well as break the garage door itself.
First visually verify that the trolley is against the stop tab make sure the garage doorway is clear of persons or obstructions release the door from the garage door opener by pulling the emergency release handle loosen the chain or belt by adjusting the outer nut 4 to 5 turns.
If that isn t the problem then try opening and closing the door with the wall switch.
The door rail connector is at the end closest to the door since the door.
Most likely this will resolve the situation.
Mine has adjusting screws one for up travel and one for down travel iirc on the other end of the case away from the door.
This is due to the fact that if the spring on your garage door is broken it could cause the full weight of the garage door to come crashing down.
This may move the chain trolley of the garage door.
If the gear becomes too worn it will no longer be able to move the chain.
Press the remote or the wall mounted start switch listen to the motor and watch the movement of the chain.
Stop tab to remove the trolley from the stop tab follow the steps below.
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I had to adjust it when i replaced the seal on the bottom of the door two years ago but it s been rock solid since.
If the motor hums but the chain doesn t move that indicates a problem with the motor.
When you re too far away then the door may not respond.
In the case that the door responds to the switch then there s a good chance it s the remote that has an issue.
This excess tension causes the gear that moves the chain to grind down.
Attempting to disengage your door in the up position is extremely dangerous.
Turn the up limit switch screw clockwise by one turn for every 3 inches that you need the garage door to raise up with a flat blade screwdriver.
The cable side is extremely tight the chain side is extremely loose.
Adjust the chain on a garage door opener with help from a garage door spec.
Garage door is in the down position seems to want to continue to go down since its cable is still tight.
