Opener runs a few inches then stops with beeping or seven flashes/code “7” on Decko opener LED.

Safety first: Unplug the opener before removing covers or adjusting limit assemblies.

Check mechanical limit cams (if equipped):

• Locate cams: Some Decko models use adjustable cams on the rail that actuate limit switches.
• Inspect for slipping: Ensure the cams are firmly clamped to the rail and positioned so they are contacted at full open and full closed positions.
• Reposition if needed: Loosen the set screw, slide the cam slightly, and retighten. Test travel.

Inspect limit/encoder wiring:

• Remove the opener cover and locate the small harness from the limit switches or encoder to the control board.
• Check for loose plugs, broken wires, or corrosion at connectors. Reseat connectors firmly.

Test operation:

• Restore power and attempt to run the door through a full cycle.
• If the opener consistently stops at the same short distance and flashes code 7, the limit switch assembly or encoder is likely defective.

Replacement of the limit/encoder assembly usually requires matching the part to your specific Decko model. If you are not comfortable identifying and replacing this component, contact a qualified technician.