Don t fault their hesitation there are several reasons for this frustrating behavior.
Garage door moves back and forth.
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Have a garage door repair technician fix the door and tracks if the door binds up on the tracks.
Replace the rail or trolley if damaged.
Sometimes garage doors close half way change their mind and go back up.
It s also a good idea at this point to look at the garage door itself at this point.
They seem to either love teasing you or fear closing.
It may need adjustment in order to function properly.
Disengage the door from the trolley by pulling the emergency cord if none of the basic checks reveals a simple explanation for why the door won t open.
Open and close the door manually checking for smooth door operation.
Try to open the door manually.
I think the problem is the outer carriage and inner carriage have so much clearance they rock back and forth.
If that doesn t fix the problem take a look at the auto reverse function.
Causing the loud rattling.
If the door doesn t reverse back before it hits the wood then you ll need to clean the eyes.
Garage doors come with a reverse mechanism which serves as a safety feature.
Run the garage door opener to move the trolley back and forth along the garage door opener rail to check for binding.