Garage Door Cable Replacement in Massachusetts

Signs your garage door cables need replacing

Cables are easy to overlook. They run from the bottom brackets up to drums on the torsion shaft, or along pulleys on an extension spring door. Wear usually starts low, where moisture and road salt collect.

Look for broken strands, rust or a flattened spot. A cable that has unwound from its drum or hangs slack is a sign something has already gone wrong. A door that lifts higher on one side often has a cable problem.

Why lift cables fail

Rust is the big one in Massachusetts. Winter slush carried in on cars keeps the bottom of the door damp, and salt speeds up corrosion. Over time the steel strands weaken and break one by one.

Cables also wear when a door is out of balance, when a drum is chipped, or when a pulley has a rough bearing. A spring that breaks can whip a cable off its drum in an instant.

Doors that are used many times a day put more cycles on their cables. So do doors that are slightly out of level, because one cable ends up carrying more of the weight than the other.

Cables and springs work as a team

Because the cables carry the spring's lifting force, a cable failure often follows or causes a spring problem. Checking both at once saves a second visit.

How garage door cable replacement works

The door is locked in place and spring tension is handled before any cable is touched. On a torsion system that means controlling the springs on the shaft. On an extension system the springs are relaxed with the door fully open.

New cables are cut to the right length and seated in the bottom brackets and the drums. Both sides are set to equal tension so the door rises level. The door is then balanced and run through several cycles.

Extension spring doors also get their safety cables checked. These run through the center of each spring and catch it if it breaks, so a missing or rusted safety cable is replaced too.

Cable types and related parts

Galvanized steel cable resists rust better than plain steel and suits damp garages. Cables come in different diameters to match door weight. Replacing both cables together keeps the lift even, since the old one on the other side has seen the same wear.

Drums, pulleys and bottom brackets get checked too. A cracked drum or a rusted bracket can ruin a new cable quickly.

Slowing rust on cables and brackets

Salt and standing water are hard on the lower part of a garage door. Sweeping slush away from the threshold and letting the garage dry out after storms both help. A bottom seal in good shape keeps rain from pooling where the cables meet the brackets.

A quick look at the cables each season is easy and safe from a distance. You are checking for loose strands, rust or slack, not touching anything. If you see a problem, call rather than adjust it.

Winter use

Cold makes a door stiffer and the opener works harder to start it moving. That extra load lands on the cables first, so frayed strands that held through the fall can give way on a January morning.

Stay clear of a broken cable

A cable under load can snap back with real force, and a door with a failed cable may drop on one side. Do not pull on a cable, try to rethread it or adjust the bottom bracket. These parts sit under spring tension and are not safe to handle without training and tools.

Keep the door closed if it is closed, and call. Johnny Garage Door Service is open 24/7 and gives a 90-day parts and labor warranty on its work.

What to expect after cable replacement

The door should rise level, with both cables wrapping neatly on their drums. It should stay put when stopped halfway by hand, which shows the springs and cables are balanced. Any worn drums, pulleys or brackets found during the work will be pointed out so you know where things stand.

Garage Door Cable Replacement questions