Beyond that if it has a chain or belt i d say something is slipping.
Garage door lurches on opening.
Just like there is a limit switch for closing the door there is also one for opening the door.
Use the information in this video at your own risk.
The opening and closing force.
As these wires short against the housing the electrical impulse causes the door opener to activate.
Up on the opener are two dials that control.
If however the door starts to open at the same time that the trolley starts to move.
Disconnect it and check operation including balance.
It s ideal for a detached garage where noise isn t a concern.
If yes this is probably where the jerking sensation is coming from.
First off make sure the door is functioning properly without the opener.
At lowe s we carry three main types.
There may also be loose wire connections inside the button housing itself.
The switch may be too far from the motor unit.
I am not a garage door expert.
This can disrupt the connection between them leaving the door unable to respond fully to your signal for it to open.
This is a budget friendly choice that runs on a metal chain but is louder than other options.
The symptom of this is a garage door that is in constant motion opening fully then immediately descending only to start the same cycle again.
The lenses will most likely be attached to metal brackets attached to the garage door frame.
Locate the lens on each side of the garage door at the bottom.
Press the button and tell me if the trolley moves any distance at all before the door actually begins to open.
Fold a soft cloth around your finger.
This lumber will be used to attach your garage door track and a portion of your assembly.