Opener will not run; logic board LED flashes 3 times, pause, then 1 time (3-1).

Safety first: Unplug the opener before disconnecting any control wiring. Use caution when working around finished walls.

Steps to fix:

• Disconnect wall control wires: At the opener, remove the two low-voltage wires connected to the wall control terminals.
• Test opener with remote: Plug the opener back in and try operating it with a remote. If it now runs, the problem is in the wall control circuit.
• Inspect wall button: Remove the wall control from the wall. Check for stuck buttons, corrosion, or water damage. Replace if the button does not click cleanly or appears damaged.
• Check wiring: Inspect the wall control cable for staples through the insulation, crushed sections, or splices. Repair or replace damaged runs.
• Reconnect correctly: Reattach the wall control wires to the opener terminals, ensuring polarity is correct if your model requires it.
• Test operation: Confirm the 3-1 code is cleared and both wall control and remotes operate the opener.