Display shows E7 and the refrigerator may not respond correctly to door openings (lights or fans behave abnormally).

Safety: Unplug the refrigerator before removing door switch assemblies or display panels.

How to troubleshoot:

• 1. Identify door switches: Haier refrigerators may use mechanical plunger switches in the door frame or magnetic reed switches hidden in the cabinet with magnets in the door.
• 2. Check operation: Open and close each door while observing the interior lights and display. If a door is reported as open when closed (or vice versa), that switch is suspect.
• 3. Inspect physical switch: For plunger switches, gently pry out the switch from the liner and inspect for broken terminals or corrosion. For magnetic systems, ensure the door magnet is present and not loose.
• 4. Test continuity: With power disconnected, use a multimeter to test the switch. It should change from open to closed when actuated. Replace if it does not change state reliably.
• 5. Check wiring to PCB: Trace the switch wires to the main control board or display PCB. Repair any damaged harnesses or loose connectors.
• 6. Replace faulty switch: Install a new Haier-compatible door switch or magnet as required. Ensure it seats fully and actuates correctly when the door closes.

Note: A faulty door switch can also cause fan shutdown or temperature issues because the control thinks the door is always open.