Microwave displays U14 and will not start a cook cycle.

Safety: Allow the steam generator to cool before handling the water tank.

Steps:

• Check water tank: Remove the water tank, fill it to the indicated level with clean water, and reinstall it firmly until it clicks.
• Inspect for leaks: Ensure the tank and its seals are not cracked or leaking.
• Clean inlet: Wipe the area where the tank connects to the microwave to remove scale or debris.
• Reset: Turn the unit off and back on, then try a steam or combination program.

If U14 persists with a full tank: The water level sensor or steam generator assembly may be faulty and should be serviced by a technician.