Henderson Stalled Motor or Jammed Door Mechanism

Garage door opener hums but door does not move.

Advertisements

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.

Advertisements

Possible Causes

Door springs out of balance, Jammed Henderson rail trolley, Seized door rollers, Failed motor start capacitor

How to Fix / Troubleshooting

Safety first: Disconnect power. A jammed door under tension can fall suddenly. Do not remove or adjust torsion springs yourself.

Steps:

  • Disengage opener: Pull the Henderson emergency release cord to separate the trolley from the door.
  • Test door by hand: Lift the door manually. If it is very heavy or will not move, the problem is with the door (springs, tracks, rollers). Call a professional for spring work.
  • Check trolley movement: With the door disconnected, restore power and run the opener. If the motor hums but the chain/belt does not move, inspect the trolley and drive system for binding or broken parts.
  • Inspect capacitor: If the motor only hums and does not start, the start capacitor may be faulty. Replace with the correct Henderson motor capacitor.
Advertisements

Repair Difficulty

Hard 4/5

Required Part

Henderson Motor Capacitor
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements