Cables work under constant load
Every time the door moves, the lift cables carry its weight in tandem with the springs. Over thousands of cycles, steel strands fatigue, especially where the cable bends around the drum.
Rust starts at the bottom
The bottom bracket sits near the floor, where moisture, road salt and cleaning water collect. Corrosion there weakens strands long before they visibly break.
Off-drum events add damage
If the door hits an obstruction or a cable goes slack, it can unwind from the drum. Re-winding it may kink the cable, creating a weak point.
What to do
If a cable looks frayed or has broken, stop using the door. The springs still hold significant tension. Have a trained professional evaluate it.
Broken cable or cable off the drum?
A snapped cable has separated or lost enough strands that it can no longer do its job. A cable off the drum may still be intact, but can be kinked, flattened or damaged after becoming slack. Both can leave a door tilted. A photograph of a hanging cable alone cannot establish which parts need replacement or why the failure happened.
Why the opposite side matters
The two sides share the lifting task. Similar age, corrosion or incompatible replacement parts can affect the intact side as well. Ask the technician to inspect both cables and explain whether a matched pair is appropriate. Replacing a cable without checking the drum, attachment points and track can leave the original source of wear unresolved.
Repair scope and pricing factors
Door height, cable specifications, damaged drums or brackets, roller condition and whether the door has derailed all affect the work. Ask for an estimate that identifies the parts being replaced and any alignment correction. A cable-only price is not necessarily the price for repairing a door that has also suffered panel or track damage.
Useful observations for your call
From a safe distance, note whether one side is higher, whether the failure followed an obstruction, and whether the door stopped with a bang. Give your ZIP code and explain whether the garage opening is blocked. Do not pull the emergency release, lift the door or test it again to demonstrate the problem.
How the lifting system fits together
Need help with your door?
Call with your ZIP and a description of the problem. An independent provider confirms availability and an estimate before work.
(213) 277-3731