BFT Trolley or Carriage Mechanical Failure

Garage door opener starts then stops after a few centimeters of movement with loud clicking from the rail.

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.

Possible Causes

Worn or broken trolley teeth on chain/belt rail, Loose door arm connection to trolley, Obstruction inside rail, Bent rail causing binding

Safety: Disconnect power and secure the door before working on the rail.

Inspect trolley: Slide the trolley along the rail by hand and look for broken plastic teeth or cracks.
Check door arm: Ensure the arm is firmly bolted to the door and trolley with no excessive play.
Examine rail alignment: Sight along the rail to see if it is bent or twisted. Straighten or replace as needed.
Replace trolley: If worn or broken, install a new BFT trolley compatible with your rail type.

Medium 3/5

BFT Trolley / Carriage Assembly

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