How to Fix / Troubleshooting

Safety first: Unplug the machine and ensure all milk components are cool before disassembly.

Cleaning milk system:

Disassemble frother: Remove the milk frother, suction tube, and any detachable parts. Soak them in warm water with a food-safe detergent to dissolve milk fat.
Clear nozzles: Use the supplied cleaning tool or a fine brush to clear all air and milk channels in the frother head.
Run cleaning program: Many Gorenje models have a milk system cleaning cycle. Run it with a dedicated milk system cleaner.
Check sensors and valves: If E12 remains, inspect the milk temperature sensor (often near the frother outlet) and the milk solenoid valve for wiring issues or blockages.

Note: Persistent E12 after thorough cleaning usually indicates a sensor or valve fault that requires part replacement.

E12 error and the milk frothing function is disabled; coffee may still brew normally.

Possible Causes