Sommer
Door Counterbalance Failure
Opener runs but door only opens a few inches and then stops; manual operation feels very heavy.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Broken torsion spring, Broken extension spring, Frayed or off‑drum lift cable, Spring tension out of adjustment
How to Fix / Troubleshooting
Critical safety warning: Do not attempt to repair or adjust torsion springs yourself unless you are trained and equipped. Springs are under extreme tension and can cause severe injury.
- 1. Disconnect opener: Pull the emergency release and try to lift the door by hand. If it is extremely heavy or will not stay open, the springs are likely broken or out of balance.
- 2. Visual inspection: Look above the door for a torsion spring with a visible gap, or along the sides for broken extension springs or hanging cables.
- 3. Do not force the opener: Unplug the Sommer opener to prevent motor damage. Do not keep trying to run it.
- 4. Call a professional: Contact a qualified garage door technician to replace springs and reset balance. After repair, reconnect the opener and re‑run travel setup if needed.
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Repair Difficulty
Professional Required
5/5
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