Can you replace a torsion spring yourself?

Why torsion springs are dangerous

The torsion spring on the bar above your door is twisted tight enough to balance a door that can weigh well over a hundred pounds, and a wind-rated door with steel struts weighs more than a plain one. To replace it, someone has to unwind the old spring and wind the new one a set number of turns, a quarter turn at a time, holding the full force with steel winding bars. If a bar slips out of the winding cone, or the wrong tool is used, the spring unwinds in an instant and the bar or the cone becomes a projectile.

The rest of the door is under that tension too. The cables and drums carry that load as well. Loosening the wrong bolt on a bottom bracket releases it.

What goes wrong for DIYers

• Using screwdrivers or rebar instead of proper winding bars.
• Buying a spring that is the wrong size for the door's weight. The door ends up too heavy or too light, and the opener pays for it.
• Winding the wrong number of turns, or winding in the wrong direction.
• Forgetting to clamp the door to the track first, so it lifts when the spring is wound.
• Reusing rusty cables and bottom brackets that should have been replaced while the spring was off.

What you can safely do

• Look at the spring. A gap in the coils means it broke.
• Lubricate the springs and hinges with a garage door lubricant a few times a year. In Orlando heat and humidity, a light coat cuts noise and slows rust. Skip heavy grease.
• Run the balance test: disconnect the opener with the door closed, lift it halfway by hand and let go. A balanced door stays put. One that drops or shoots up needs its springs adjusted by a technician.
• Replace the remote battery, clean the safety sensors and tighten loose hinge screws on the door sections.

Extension springs

Older doors, common in the 1960s and 1970s houses around College Park and Pine Castle, may have long springs stretched along each horizontal track instead of one above the door. They hold less energy than a torsion spring when the door is open, but a spring without a safety cable running through it can snap and whip across the garage. If yours have no safety cables, have them added or replaced. Garage door safety.

What it costs to have it done

This Old House puts a torsion spring replacement at $350 to $540 installed, with the spring itself at $80 to $120 (March 2026). The difference is the labor and the risk. Given what can go wrong, I think that is a fair trade. Broken spring repair.

Florida's Construction Industry Licensing Board certifies garage door installation specialty contractors (Rule 61G4-15.100(1)(k), in effect since May 5, 2024). You can look up any company's license at myfloridalicense.com.