If your garage door is very difficult to open manually it could be for several reason.
Should garage door stay open manually.
However if your garage door is the only way to access your garage you may need to contact a professional to open your garage door.
Springs on your garage door may hold it in place so it should stay open on its own when you manually operate it.
Your door may have defective springs or another issue if it can t stay open.
Secure the garage door in this position by clamping vice.
Raise the garage door up to its fully open position.
How to adjust manual garage doors to stay up step 1.
While you can prop it open or have others hold it long enough to take your car or other items out of the garage you should contact a professional and avoid operating your door if you notice any issues.
Garage doors operate as a system using springs cables drums hinges rollers tracks and sometimes pulleys.