Oven does not reach set temperature, display shows F02 after some minutes of operation.

Safety: Isolate the appliance from mains before removing panels or testing resistance.

• Locate the sensor: On most Ariston built-in ovens and ranges, the temperature sensor is a thin metal probe at the rear of the oven cavity, usually top corner, secured with 1–2 screws.
• Remove and test: Unscrew the probe, gently pull it forward to access the connector. Disconnect it and measure resistance with a multimeter. At room temperature (~20–25°C), most Ariston NTC sensors read around 500–1100 Ω (check service data for your model). Infinite or near-zero resistance indicates a fault.
• Inspect wiring: Check the harness from the sensor to the control board for cuts, melted insulation, or loose connectors at the PCB.
• Clean contacts: Lightly clean oxidised spade terminals with contact cleaner and reconnect firmly.
• Replace sensor: If resistance is out of spec, install a new genuine Ariston oven temperature sensor. Route the cable away from hot elements and sharp edges, then refit the mounting screws.
• Reset and test: Restore power, clear the error by switching the oven off/on, then run a preheat cycle to 180–200°C and verify that F02 does not reappear.