Dishwasher shows E12; water may be too hot or cycle ends quickly with steam and strong odor.

Safety first: Disconnect power immediately if you suspect overheating. Components can be extremely hot.

• Check inlet water temperature: Ensure household hot water is not set excessively high (target around 120°F / 49°C).
• Inspect temperature sensor: Access the sump area and locate the NTC sensor. Check for secure mounting and good contact with water flow.
• Test sensor resistance: With power off, disconnect the sensor and measure resistance at room temperature. Compare to Zline specifications; replace if out of range.
• Evaluate control board: If the sensor is good, the heater relay on the main control may be stuck closed. Inspect the board for burnt spots and replace the control board if necessary.
• Do not bypass safety devices: Never bypass thermostats or sensors; this can create a fire hazard.