Why does AccuDry3 1417 display 'door open' even when the door is closed?

Instructions for how to upgrade the Interface Resistor on the AccuDry3 1417, to fix a fault which means 'door open' shows even when the door in closed.

The full instructions with images and diagrams are included in the PDF document.


Why does AccuDry3 1417 display 'door open' even when the door is closed?