Washer-dryer combo shows E16 and may not fill or may overfill; water level readings appear inconsistent.

Safety first: Unplug the unit and allow any hot water to cool before accessing the heater or sensor area.

Step-by-step checks:

• 1. Locate the wash NTC sensor: Typically mounted in the tub wall or on the heater housing. Remove the rear panel to access.
• 2. Inspect wiring: Check the NTC connector and wiring harness for damage or loose connections. Reseat the connector.
• 3. Test the NTC: Disconnect the sensor and measure its resistance at room temperature. Compare to Monogram specifications (commonly 10k–20k ohms at 25°C). Infinite or zero resistance indicates a failed sensor.
• 4. Replace the sensor if faulty: Install an OEM Monogram NTC sensor, ensuring it is fully seated and sealed to prevent leaks.
• 5. Reset and test: Reassemble, restore power, and run a warm wash cycle to confirm E16 is cleared and temperature control is normal.

When to call a technician: If the NTC and wiring are good but E16 persists, the main control board may be defective and should be professionally evaluated.