Steam‑assist or moisture function fails; error indicates steam generator or humidity system fault (on steam‑equipped models).

Safety first: Turn off power and allow the oven to cool. Hot steam can cause severe burns.

• 1. Check water tank: Ensure the removable water tank (if equipped) is filled and properly seated in its compartment. Clean any scale or debris from the tank contacts.
• 2. Descale system: Run a descaling cycle if the model supports it, using the recommended descaling agent. Limescale can block the steam generator and sensors.
• 3. Inspect steam inlet: Check the steam outlet and inlet ports inside the cavity for blockages. Clean gently with a soft brush.
• 4. Test steam generator: With power off, access the steam generator module. Measure resistance of the heater element; an open circuit indicates a failed generator that must be replaced.
• 5. Sensor and switch check: Inspect any flow switches or temperature sensors associated with the steam system. Replace faulty components as needed. Due to complexity and scalding risk, steam system repairs are often best left to an authorized technician.