Garage Door Balance Test
http://PrecisionDoor.net/GarageDoors/ A properly balanced garage door is a MUST when you want to protect your garage door opener.
When the correct size springs (in good working condition) are placed on a garage door, the door should balance properly. This effectively makes the door feel like 5-10 pounds.
An out of balance garage door will destroy a garage door opener.
This video will show you how to test if your garage door is balanced.