Dishwasher shows E12 and may have issues with drying or condensation; sometimes associated with steam escaping from unusual places.

Safety first: Disconnect power before accessing the door or top cover.

• Inspect vent flap: Locate the drying vent on the door or top panel. Check that any mechanical flap or cover moves freely and is not stuck by grease or detergent residue. Clean and free the mechanism.
• Check door seal: Inspect the main door gasket and upper seals for damage or deformation that could affect airflow. Replace if torn or badly compressed.
• Access drying sensor: Remove the inner door panel to locate the humidity/temperature sensor associated with the drying system. Ensure the connector is secure and free of corrosion.
• Clean sensor area: Wipe away any heavy condensation residue, detergent, or limescale around the sensor and vent path.
• Advanced diagnostics: If you have a multimeter and service data, measure the sensor resistance at room temperature and compare with specifications. A shorted or open sensor must be replaced.
• Reassemble and test: Refit the door panel, restore power, and run a drying cycle to check if E12 returns.