If it is really heavy then you most likely have a broken garage door spring.
Hiw to lower a garage door with a broken spring.
Remove the first winding bar and lower the second bar to the top of the garage door then insert the first.
Next try to lift the door.
Step 2 insert each pry bar under the corner of the door between the door and the floor.
Once the tension is released you can remove the spring from the track.
Looking to open it yourself.
After you then disconnect the safety cable from one end.
Spring used in the video.
Stand in the middle of the door have each hand on a different panel to minimize panel damage and lift just like you do in the gym a good grunt might help.
Https amzn to 2bnos0s as an aff.
Unless you have experience with broken springs don t.
Spring replacement costs will vary depending on the weight of your garage door and the life cycle rating for the spring itself.
Again this is not a do it yourself project as garage door springs are very dangerous and require the proper tools and techniques to replace them.
Have a friend on one side of the door and you on the other side.
If you have a broken spring the opener might stay at a slower speed due to the heavy weight of the garage door.
Position a 6 foot step ladder at each side of the garage door.
Learn how to remove a broken garage door torsion spring and replace with a new one step by step.
Given the fact most are made of steel or wood it will be heavy.
Lifting a door with a broken spring means you will have to lift the weight of the door panels.
Leaving the garage door open and securing it ensures that the tension on the spring is released.
Lower the winding bar to the top of the garage door then insert a second winding bar.
Secure the door open preferably using c clamps.