Display shows E9 and the wine cooler may shut down or fail to maintain temperature, sometimes accompanied by beeping.

Safety: Unplug the unit before removing trims or accessing wiring around the door frame.

Steps to address E9:

• Check door closure: Ensure the door closes fully and the gasket is not obstructed by shelves or bottles.
• Locate the door switch: On many Haier wine coolers, the door switch is a magnetic reed switch embedded in the cabinet frame, activated by a magnet in the door.
• Test the switch function: With the unit powered, open and close the door to see if the interior light and door-ajar indicator respond correctly. If the light stays on or the alarm persists, suspect the switch.
• Inspect magnet alignment: Verify that the magnet in the door (often hidden in the frame) aligns with the switch location on the cabinet. Adjust door hinges if the door has sagged.
• Access and test the switch (if serviceable): Remove the inner trim near the switch area. Disconnect the switch and test continuity with a multimeter while placing a magnet near it. The reading should change from open to closed.
• Replace faulty switch: Install a Haier-compatible door reed switch or mechanical door switch as originally equipped. Secure wiring and reassemble trims.
• Re-test: Restore power and confirm that the E9 code and beeping stop when the door is closed.

Note: If the switch and magnet are good but E9 persists, the main control PCB input circuit may be defective and require professional diagnosis.