If your garage door is not opening or has become jammed, you may need to replace the garage door cables. Unless you have the proper tools and know-how, this is a job best left to a professional due to the weight of the garage door and the extreme tension of the springs. The cost of repair will vary depending on your location, the length of the cables you need, and the time it takes the pro to do the replacement.
From a big-box store, basic garage door cables can run between $8 and $20, depending on the product. Your pro may charge you a different cost if they provide the cables. Your cables may not need to be replaced if they have simply come off the track, but broken cables will need to be completely removed and replaced. In either instance, the pros will need to secure or take down the door; unwind the springs; reset or replace the rollers, cables, and drums; and then wind the springs once more. For example, a pro could reset cables that have come off the track for $129.99. The average national cost for a garage door repair specialist is $80 - $110 per hour and the typical cost to replace a broken garage door cable is anywhere from $130 to $200.