Electric oven on a Grundig range shows F0 and will not start a cooking program.

Safety first: Isolate the range from mains before removing any panels. The oven cavity and rear panel edges can be sharp.

• Cool the oven: Ensure the oven is completely cool before working.
• Access sensor: Locate the temperature sensor inside the oven (usually a thin metal rod at the top rear). Check that it is firmly mounted and not physically broken.
• Rear connection check (qualified): Pull the range forward, remove the rear panel, and verify the sensor connector is fully seated on the wiring harness.
• Replace sensor if open: If you have a multimeter and skills, measure the sensor resistance (typically around 1 kΩ–1.1 kΩ at room temperature). If open or far out of range, replace with a Grundig‑compatible oven temperature sensor.

If F0 persists after sensor replacement, the electronic oven control may be faulty and require replacement.