If the garage door weight and balance are adjusted correctly then spring tension actually holds the door in position and not the opener itself.
Garage door closes all the way then opens again.
It goes partway down reverses direction and goes back up again.
Turn the down limit switch screw clockwise one turn with a flat blade screwdriver if the garage door closes and then begins to open back up.
This is almost always the result of a dirty.
If it closes only partway the safety sensors are usually responsible clean the lenses or realign them and make sure there are no obstacles blocking the beam.
To fix this issue and get your liftmaster garage door opener working again follow these troubleshooting steps.
Pull the emergency release handle down and back towards the garage door opener.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
Your garage door s logic board is the brain of your garage door opener.
The garage door will automatically go in reverse whenever it hits an obstruction such as the driveway or ground.
Get logic board replacement.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
This brain can wear out in time so you could need a replacement.
If your garage door won t open or close the problem could be a bent track a broken torsion spring or a bad capacitor int he motor housing.
For that reason the opener does not have any specific brake or clutch or other door holding function other than the resistance of the motor and the safety systems which typically just reverse the door open.
Close the door with either the door control or the remote control.
Close the garage door with the opener and watch it closely as it closes.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.