Display shows F3 and oven will not heat or shuts down shortly after starting.

Safety first: Disconnect power at the breaker before removing panels or handling wiring.

• Access sensor: Open the oven door and locate the temperature sensor probe on the rear interior wall. Remove the mounting screws and gently pull the sensor forward to access the connector.
• Check connection: Ensure the sensor plug is fully seated in the harness. If it has come loose, reconnect it securely.
• Test resistance: With the sensor unplugged, measure resistance across the sensor leads. Around 1080–1100 Ω at room temperature is typical. If the reading is infinite (open) or extremely high, replace the sensor.
• Inspect harness: If the sensor is in range, check continuity from the sensor connector to the EOC connector using a multimeter. Repair or replace any open wiring.
• Replace sensor: If the sensor is faulty, install a new oven temperature sensor probe compatible with your Thor Kitchen model and reassemble.