Opener strains or door won't lift: broken spring (diagnose and refer)

Springs carry the door weight; the opener only guides it. A broken torsion or extension spring makes the door too heavy, and the opener strains, reverses or strips gears. Spring and cable work is blocked: confirm the symptom safely and refer to a garage-door technician.

Cross-checked ~15 min easyBrands: All

Before you start

BLOCKED: do not adjust, unwind or replace torsion springs, cables or bottom brackets; they store dangerous energy.
Do not keep cycling the opener against a broken spring.
Do not pull the emergency release with the door open if a spring is broken; the door can drop.

Diagnostic steps

Unlock all 4 steps with expected values

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

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