My garage door opens, but it wont close. What could be the problem?
There are many reasons why your garage door may not close. The main reason is that there is a problem with a safety device on your electric garage opener called photo cells. These are small photo electric devices which are mounted approximately 8 off of the garage floor, on or near your garage doors vertical track. These devices stop your garage door from going too close if there is an obstuction in the way of its operation. From time to time, they do malfunction. The most common cause of malfunction in the photo cells is something that may be obstucting their view. Most residential homes equipped with photo cells have two photo cells–one on each side of the garage door opening. These devices need to be able to see each other. If there is something blocking the path, or view, of these photo cells, the garage door will not close. Check to make sure that the photo cells are not obstructed in any way. Garden tools, bicycles, balls and even cobwebs can obstruct the view of the photo cells
