Oven displays F3 and stops heating; may occur shortly after starting a bake cycle.

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

• Step 1 – Access the sensor: Inside the oven cavity, locate the temperature sensor at the rear wall. Remove the mounting screws and gently pull the sensor forward to expose the connector.
• Step 2 – Check the connector: Ensure the sensor plug is fully seated and not corroded or burnt. Reseat the connector several times to clean the contacts.
• Step 3 – Test the sensor: With the sensor unplugged and the oven still disconnected from power, measure resistance across the sensor terminals. At room temperature, it should be around 1080–1100 Ω (consult Zline specs). If the meter shows OL (open) or a very high value, the sensor is defective.
• Step 4 – Inspect harness: If the sensor tests good, trace the harness from the sensor to the control board. Look for cuts, pinches, or breaks, especially where the harness passes through the rear of the oven.
• Step 5 – Replace parts as needed: Replace the oven temperature sensor if it is open or out of range. If the sensor and wiring are good, the control board’s sensor circuit is likely faulty and the control board must be replaced.

Tip: Always compare your sensor reading to the specification in the Zline service documentation for your exact model.