Consider adding a photo eye or edge sensor as an extra measure of safety to protect against entrapment. Keep in mind that adding more safety devices will not make an old opener meet the current U.L. standards. Testing and Maintaining the Garage Door Perform routine maintenance steps once a month. Review your owner's manual for the garage door. If you don't have a manual, look for the model number on the back of the door, or check the lock handle, hinges or other hardware for the manufacturer's name and request a manual from the manufacturer.
Springs are under high tension.
Only qualified persons should adjust them. Visual Inspection Look at the garage door springs, cables, rollers, pulleys and other hardware for signs of wear. If you suspect problems, have a qualified person make repairs. Garage door springs, cables, brackets and other hardware attached to the springs, are under very high tension and, if handled improperly, can cause serious injury. Only a qualified professional or a mechanically experienced person carefully following the manufacturer's instructions should adjust them.