Display shows error shortly after start, oven does not heat, fan may run briefly

Safety first: Isolate the oven from mains power before removing any covers.

• Check sensor connection: Remove the oven from the cabinet if built‑in. Access the rear panel and locate the temperature sensor wiring. Ensure the connector is fully seated on the sensor and on the main PCB.
• Continuity test: Disconnect the sensor from the PCB and measure resistance across the sensor leads. An OL reading indicates an open sensor that must be replaced.
• Harness inspection: If the sensor tests good, check continuity from the sensor connector to the PCB connector through the harness. Repair or replace the harness if any conductor is open.
• Clean connectors: Lightly clean any oxidized contacts with electrical contact cleaner and reseat firmly.
• Reassemble and test: After replacing the sensor or repairing wiring, clear the error by disconnecting power for 1–2 minutes, then restore power and test a heating cycle.