Door will not close completely; stops short of the floor and shows E12.

Safety first: Keep clear of the door path while adjusting limits.

• Inspect floor area: Check for raised concrete, rubber thresholds, or objects on the floor that stop the door early. Remove obstructions or adjust the stop if appropriate.
• Check arm and brackets: Ensure the header bracket and door arm are not bent or contacting the opener rail before the door is fully closed.
• Check chain/belt tension: Tighten a slack chain or belt according to Cardale specifications so it does not jump teeth near the closed position.
• Re‑set close limit: Use the control panel to adjust the close limit so the door seals firmly against the floor without excessive force. Save the new setting.
• Verify safety reversal: Place a small block of wood under the door and close it. The door should reverse when it contacts the block. If not, adjust force settings per the manual.