Opening the door yourself is recommended only during an emergency, as there is an increased risk of it getting stuck again-or worse yet, crashing down on top of you. Moving a wooden door could cause damage to the opener, or the top of a steel door might bend underneath the pressure. If you must open the door long enough to drive underneath it, you may want to prop up either side with some 2×4 pieces of lumber to provide added stability. You could also secure your door to its tracks using a pair of vise grips or a couple of c-clamps.
While it would be wonderful if door springs lasted forever, the reality is that the simple act of opening and shutting the door multiple times every day isn’t easy. It’s hard on the springs, even though they’re built to do it. Most springs will last for a while, but they won’t last forever. The regular wear and tear of endlessly opening and shutting the door breaks them down and eventually, they’ll need to be replaced.
Test the door balance. A garage door should require only a few pounds of pressure to move it up and down. If springs wear out and lose their resiliency, a power garage door opener may need to work extra hard to lift the door. This can quickly wear out the motor on the opener. Replacing worn-out springs is usually a job for a professional technician.
11.2a Raise the garage door slowly. Check the door balance. If you have the correct springs the door should stay down when closed, half way when opened half way, and open when opened. If the door will drop to the floor by itself from the halfway point, add 1/4 turn of tension to each of the torsion springs. If the garage door won't stay on the floor, and if it pulls itself up when stopped halfway, close the door and remove 1/4 turn of tension from the springs.