Wolf oven displays E03 and may shut down during operation or fail to start a cycle.

Safety: Turn off power at the breaker and allow the oven to cool completely.

Basic checks:

• Confirm that the oven vents are not blocked by cabinetry trim, foil, or pans. Wolf ovens require proper airflow around the unit.
• Inspect the temperature sensor for physical damage or shorted wiring. Measure resistance at room temperature; a very low resistance (near 0 Ω) indicates a shorted sensor.
• Locate the high-limit thermostat / thermal cutoff (often mounted on the top of the oven cavity or rear). Check for continuity; if it is open, it may have tripped due to overheating.

Corrective actions:

• If the sensor is shorted or out of spec, replace the oven temperature sensor.
• If the high-limit thermostat is open and non-resettable, replace it with the correct Wolf part and investigate causes of overheating (blocked vents, failed cooling fan).
• If the oven continues to overheat or E03 returns, the control board bake relay may be stuck closed and the board should be replaced by a technician.