Oven does not heat; display is on, fan may run, but temperature never rises and E01 appears on the display.

Safety first: Disconnect the oven from mains power by switching off the circuit breaker or unplugging it. Verify no power is present before working inside the appliance.

Steps to check the temperature sensor (NTC):

• Locate the temperature sensor probe inside the oven cavity, usually at the rear upper area, secured with 1–2 screws.
• Remove the screws and gently pull the sensor tip into the cavity to access the wiring connector from the rear (you may need to remove the back panel).
• With a multimeter set to resistance (Ω), measure the sensor across its two terminals. A typical Teka NTC sensor should read roughly 500–1100 Ω at room temperature (exact value varies by model; consult the service manual if available).
• If the reading is infinite (open) or near 0 Ω (short), the sensor is defective and must be replaced.
• Inspect the wiring harness from the sensor to the electronic control board (PCB) for cuts, burns, or loose connectors. Reseat the connector on the PCB.
• Install a new OEM Teka-compatible temperature sensor if faulty, route the cable away from hot or sharp edges, and secure it with the original screws.
• Restore power and test the oven by setting a moderate temperature (e.g., 180°C) to confirm that heating resumes and the error clears.

When to call a technician: If the sensor and wiring test good but E01 persists, the fault may be on the control board’s sensor input circuit, which typically requires board-level repair or replacement.