Your garage door has set limit switches that instruct the motor when to stop running both when it is opening and when it is closing.
Garage door closing but not opening.
Turn the power back on and the door should open and close normally.
In most cases the cause will be a stripped gear or a chain that has come off the sprocket.
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.
The door has dislodged from its track.
The trolley moves along the chain drive the long track attached to the ceiling when the garage door is opening or closing attached via a metal bar to the inside top of the garage door.
This is of course a safety feature to prevent the heavy garage door crushing anyone or anything that might be in the pathway of the door when it comes down.
Snapped or loose cables.
Its power source is disrupted.
When the settings are too high the door senses the floor as an obstruction and immediately opens again after closing.
If the garage door opens correctly but fails to close completely there may be one of three common causes.
The good news is this can be easily adjusted with a screwdriver and a few.
The limit setting is off.
The torsion springs are broken.
There s something wrong with the garage door opener that s stopping it from opening the door for you.
11 reasons why your automatic garage door won t open or shut the photo eye is blocked.
Use a screwdriver to tighten the wire.
My garage door will open but not close with remote posted on may 16 2020 by bandi ruma garage door openers top 10 reasons your garage door won t garage door is opening by itself garage door won t open.
Shut off the power to the garage door opener.
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.