Freezer shows E9; door alarm may sound continuously even when door is closed.

Safety first: Unplug the freezer before testing or replacing the door switch.

• 1. Locate the door switch: On Electrolux freezers, the door switch is usually in the door frame or integrated into the liner near the top.
• 2. Check door alignment: Ensure the door closes fully and the gasket makes uniform contact. Adjust hinges if the door is sagging.
• 3. Test the switch: Remove the switch or access its connector. With a multimeter, test continuity while pressing and releasing the switch (or moving the magnet near a reed sensor). Replace if it does not change state reliably.
• 4. Inspect wiring: Check for broken or pinched wires between the switch and control board.
• 5. Replace control board if needed: If the switch and wiring are good but E9 persists, the control board input may be defective and require replacement.