The display shows an error, the oven will not start, the fan may run, but the cavity remains cold.

Safety first: Disconnect mains power before working on the oven.

• Remove and test sensor: Unscrew the sensor from inside the cavity and pull it out carefully. Disconnect the plug and measure resistance. A reading near 0 Ω indicates a shorted sensor that must be replaced.
• Check for moisture damage: Inspect the sensor body for signs of corrosion or moisture. If the oven has been steam-cleaned frequently, the sensor may have absorbed moisture and failed.
• Inspect wiring: Look for crushed or melted sensor wires where they pass through the rear wall grommet. Repair any damaged insulation and ensure that wires are not touching each other or the chassis.
• PCB input check: If a new sensor still shows a short reading when connected, the sensor input circuit on the main PCB may be damaged. In this case, replace the main PCB.