Garage door spring repair and replacement

Broken Garage Door Spring: Signs, Safety, and the Next Call

Learn the common signs of a broken spring, what not to touch, and what information helps a trained door technician prepare for the repair.

3 min read

A garage door spring carries or controls serious stored energy. If you suspect a broken spring, stop operating the door and keep people away from the opening.

Do not loosen spring hardware, cables, bottom brackets, drums, or fasteners connected to the counterbalance system. DASMA warns that springs and spring hardware are under high tension and should be adjusted by qualified people.

Common signs of a spring problem

You may notice any of these 8 signs:

  • a visible gap in a torsion spring above the door.
  • a hanging or separated extension spring.
  • a loud bang from the garage.
  • a door that feels extremely heavy.
  • an opener that runs but cannot lift the door.
  • a door that rises only a few inches and stops.
  • slack, tangled, or displaced cables.
  • a door sitting crooked in the opening.

These signs can overlap with cable, track, opener, or hardware failures. The safe response is the same: stop and have the system inspected.

What to do now

  1. Stop using the wall control and remotes. Repeated operation can damage the opener or pull the door out of alignment.
  2. Keep clear of the door and its travel path. Do not stand or park under a partly open door.
  3. Do not pull the emergency release under a raised or unstable door. Disconnecting the opener can allow an unbalanced door to move suddenly.
  4. Secure the area. Keep children and pets away.
  5. Call a trained door systems technician. Describe the door size, spring location, position of the door, visible damage, and whether a vehicle is trapped.

If the door or attached structure is moving, falling, or creating an immediate danger, leave the area and contact emergency services.

Should both springs be replaced?

Some doors use a pair of springs. DASMA’s consumer safety guidance recommends replacing both when one of a two-spring system breaks. The technician should confirm the system design, door weight, correct spring specification, and condition of cables, bearings, drums, rollers, and hardware.

Ask what cycle rating is being installed and whether the repair includes balancing the door and testing the opener’s safety functions after reconnection.

Information that helps the technician

Before calling, take photos from a safe distance. Note these 6 details:

  • single or double-width door.
  • approximate door material.
  • torsion spring above the door or extension springs along the tracks.
  • door fully closed, partly open, or open.
  • opener make and model if visible safely.
  • any bent track, loose cable, or damaged section.

The objective is not to diagnose the spring over the phone. It is to help the technician arrive prepared while you leave the stored-energy work alone.

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