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Garage door chain stuck.
Do not use wd 40.
Here are a half dozen of the most common reasons a garage door will get stuck.
Check to see if anything a shovel broom etc fell and is now stuck in the track that is causing it to be lodged.
Disengage the door from the trolley by pulling the emergency cord if none of the basic checks reveals a simple.
Poor lubrication if your door s motor has a chain drive the chain needs to be lubricated on a regular basis just like the chain on a bicycle.
Make basic checks first.
Ensure that the unit is plugged in the door isn t locked and if you are using a remote.
How to fix a chain drive garage door when it won t open 1.
Lodged garage door track.
You should properly lubricate your garage door s track the opener chain and the springs every few months as part of regular preventative maintenance.
Poor lubrication is a very common and easy to fix explanation for why you might find your garage door stuck.