Decko Drive Gear or Sprocket Failure

Door will not open from Decko opener, but can be lifted manually when disconnected.

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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

Stripped nylon drive gear inside opener, Broken chain/belt sprocket, Sheared drive shaft pin, Excessive door load causing gear wear

How to Fix / Troubleshooting

Safety first: Unplug the opener before removing the cover. Ensure the door is fully closed or securely propped open if disconnected.

Inspect drive system:

  • Remove the opener cover to expose the motor and drive assembly.
  • Look for plastic shavings around the large nylon gear; this indicates wear or stripping.
  • Check the chain/belt sprocket on top of the opener for wobble, cracks, or separation from the shaft.

Check chain/belt movement:

  • Run the opener briefly (cover off, keep hands clear). If the motor shaft turns but the chain/belt does not move, the gear or sprocket is stripped.

Replacing the drive gear and sprocket kit is a moderate repair requiring disassembly of the opener head. Match the kit to your Decko model. If you are not comfortable with internal mechanical work, contact a technician.

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Repair Difficulty

Hard 4/5

Required Part

Decko Drive Gear and Sprocket Kit
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