A common garage door weighs 70-250 pounds, making it difficult to open either with a door opener or by hand. Most garage doors rely on torsion springs to balance the weight of the door. The ideal state is that the torsion just overcomes the weight of the door so that only a small force (10-15 pounds) can be used to pull the garage door, and the door will It can automatically stop at the half-open state, which greatly reduces the load on the door opener, and also makes it possible to open the door manually in the event of a power failure or failure of the door opener. If the torsion spring preload is too small, the door becomes very heavy, making it difficult and dangerous to open the door manually.

The torsion spring has been adjusted when the garage door is installed. The test method is that it is easy to lift the door manually without connecting the door opener. After releasing your hands, the door will automatically hover and the door opener will work easily. But as time goes by, the torsion spring will become loose and the torsion force will become smaller, resulting in greater resistance to opening the door, and the door opener has to run under a high load state, which affects the life of the motor and the belt. More importantly, it becomes very difficult to open the door manually. Even if it is opened, the door cannot hover, and it will slip and hurt people or vehicles. Manual opening of the door is only used in emergencies. Even if the door is difficult to open, you will still want to try it. In that circumstance, accidents are prone to occur. This is the main reason garage doors hurt people.

So, it’s important to regularly check that your garage door is balanced. If you find that it is very difficult to open the door manually and cannot hover, it is necessary to adjust the torsion spring. The preload force of the torsion spring is very large, special tools are required for adjustment, and extra care must be taken during operation.