A straight cable swap on a sectional steel door is usually a same-visit job once we're on site - unwind the spring tension safely, pull the old cable off the drum, run the new one, re-tension, test the balance. If the drum itself is scored or the track's been bent by the failure, that adds time and a part we may not have pre-loaded on the truck, which means a short return trip. We'll tell you straight if that's the case rather than bolting a cable to a drum that's going to chew through the next one in six months. One honest limit: if the door's original springs and cables are both near end of life, we'll usually recommend doing the full set rather than a one-off cable fix, because a single-cable repair on failing hardware is a short-term patch, not a real fix.