Opener hums briefly then stops; motor does not turn; five flashes or code “5” on Decko opener LED.

Safety first: Unplug the opener before removing covers. Do not attempt to open or rewind the motor yourself.

Check door movement first:

• Disconnect trolley: Pull the emergency release and move the door by hand. It should move smoothly with moderate effort.
• If door is hard to move: Have a garage door professional correct spring balance, track alignment, or panel damage before further opener work.

Inspect motor and capacitor:

• Remove opener cover: With power disconnected, remove the screws securing the Decko opener cover to access the motor compartment.
• Locate start capacitor: Most Decko AC motor units use a cylindrical start capacitor mounted near the motor with two wires.
• Check for bulging or leaks: If the capacitor is swollen, cracked, or leaking oil, it is likely defective and should be replaced with the same µF and voltage rating.
• Spin motor shaft: If accessible, gently try to rotate the motor shaft or pulley by hand. It should turn smoothly. If seized, the motor must be replaced.

Replace start capacitor (if faulty):

• Discharge the capacitor by shorting its terminals with a resistor or insulated screwdriver (if you are not experienced, have a technician do this).
• Note wire positions, remove the old capacitor, and install the new one with identical ratings.
• Reassemble the opener, restore power, and test.

If the motor still only hums and trips code 5, the motor windings or control board are likely defective and require professional replacement.