Mighty Mule
Improper Door Spring Balance (Not Opener Fault)
Door slams shut quickly when disconnected from opener or is very heavy to lift.
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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 or extension spring, Incorrect spring tension, Worn spring hardware, Cable off drum
How to Fix / Troubleshooting
Critical safety warning: Garage door springs are under extreme tension and can cause severe injury or death if handled improperly. Do not attempt spring adjustment or replacement unless you are trained and equipped.
- Do not use opener: Disconnect power to the Mighty Mule opener and do not attempt to operate it. Running an opener on an unbalanced door can destroy the opener and is unsafe.
- Visual inspection: From a safe distance, look for a visible gap in torsion springs or hanging/broken extension springs. Do not touch them.
- Call a professional: Contact a qualified garage door technician to repair or replace springs and rebalance the door.
- Reconnect opener after repair: Once the door is properly balanced and moves easily by hand, reconnect the opener and recheck travel limits.
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Repair Difficulty
Professional Required
5/5
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