Refrigerator displays EC70; may be accompanied by door alarm issues or interior lights not behaving correctly.

Safety first: Disconnect power before removing trim or switch housings. Use care not to damage door gaskets.

Step 1 – Check door operation

• Open and close the affected door while observing interior lights and the door‑open indicator.
• If lights stay on when the door is closed, or the door alarm sounds continuously, the door switch may not be registering.

Step 2 – Inspect door switch and magnet

• Locate the door switch (often in the ceiling or side wall of the compartment) and the corresponding magnet in the door frame.
• Ensure the magnet is present, not loose, and aligned with the switch location.
• Check for physical damage or moisture intrusion around the switch.

Step 3 – Test the door switch

• With power off, remove the switch from the liner carefully.
• Disconnect the switch and test continuity with a multimeter while activating it (or bringing a magnet close, for reed switches). It should change state (open/closed) when activated.
• If it does not change, replace the door switch.

Step 4 – Inspect wiring

• Check the harness from the switch to the control board for pinched or broken wires, especially near hinge areas.
• Repair or replace damaged wiring as needed.

When to call a professional: If the switch and wiring test good but EC70 persists, the main control board may not be reading the input correctly and should be evaluated by a Sub‑Zero technician.