Typically in residential garage doors if your door is difficult to open manually it is caused by a broken or failing spring s.
Garage door opening manually.
To manually open your garage you will first need to open any latches or locks on the outside that otherwise keep the door shut.
Keep your owner s manual on hand.
Consult it first before tinkering with your door.
Keep the rollers and chain lubricated on your garage door.
Torsion spring systems use spring s that are mounted to a spring bar torsion tube that is mounted to the header above the garage door opening.
Keep your garage door manual on hand and consult it before you begin working on your door.
If you have a locked garage the house will generally have the clasp side attached to it while the other side where the locking mechanism goes will attach to the garage itself.
This can help avoid injury or damaging the door while working.