Dual-zone La Sommeliere wine cooler shows E7 and one zone does not regulate temperature correctly.

Safety: Unplug the cooler before removing any internal panels.

Steps:

• 1. Identify affected zone: Check which zone (upper or lower) is not cooling correctly or shows unrealistic temperatures.
• 2. Locate zone sensor: Each zone typically has its own NTC sensor mounted on the rear wall or near the evaporator cover. Remove shelves and the inner rear panel for the affected zone.
• 3. Inspect sensor and wiring: Look for a small probe with two wires. Check for damage, corrosion, or a loose connector where it joins the main harness.
• 4. Test resistance: Measure the sensor resistance at the current compartment temperature and compare to expected NTC values. If open or shorted, the sensor is faulty.
• 5. Replace sensor: Install a new La Sommeliere zone temperature sensor (upper or lower). Route the cable as originally installed and secure it away from moving parts.
• 6. Check harness routing: On some models, the harness passes between zones; ensure it is not pinched by panels or shelves.
• 7. Reassemble and test: Restore power, clear the error by power cycling if needed, and verify both zones reach and maintain their set temperatures.

When to seek help: If both sensors test good but E7 persists, the main control board may have a defective sensor input channel.