Refrigerator displays E18 and may not maintain set temperatures; compressor may run continuously.

Safety first: Disconnect power before accessing sensors or the control board.

Steps to check:

• Verify actual temperatures: Place an accurate thermometer in both the refrigerator and freezer compartments to compare actual temperatures with the display.
• Inspect sensors: Check that all compartment sensors are properly mounted and making good contact with the surfaces they monitor.
• Replace suspect sensors: If any sensor reading is significantly off compared to actual temperature, replace that sensor with a Thermador-compatible NTC sensor.

Note: If all sensors are correct but E18 persists, the main control board may require reprogramming or replacement by a Thermador service technician.