Danby refrigerator shows dO or DO and may beep, indicating a door open condition.

Safety: This is generally not an electrical hazard, but unplug the unit before testing switches or removing panels.

Steps to address dO/DO:

• Verify door closure: Ensure the door is fully closing and that shelves or food items are not preventing a tight seal.
• Check door alignment: Inspect hinges for sagging. Adjust the door or hinge screws so the gasket contacts the cabinet evenly.
• Inspect the door gasket: Look for tears, warping, or debris on the gasket. Clean with warm soapy water and replace if damaged.
• Test the door switch: Locate the door switch (usually in the frame) or magnetic reed sensor. Press the switch by hand; the interior light should turn off. If not, test continuity with a multimeter and replace the switch if faulty.
• Check wiring: If the switch is good, inspect the wiring harness from the switch to the control board for breaks or loose connectors.