Miele Coffee System Error Code F73

• Machine fails to dispense water or coffee during brew cycle
• Error code F73 appears on the display screen
• Coffee output is significantly reduced or completely absent
• Machine may make unusual grinding or clicking noises
• Water tank appears full but machine indicates a water flow problem
• Brew process stops midway through operation
• Machine may go into standby mode after displaying the error

• Water pump failure or malfunction due to lack of maintenance
• Clogged water lines or internal tubes from mineral buildup (common in areas with hard water)
• Improperly seated or damaged water tank connection
• Air trapped in the water system preventing proper pressure
• Faulty water level sensor not detecting adequate water supply
• 120V electrical supply issue affecting pump operation
• Blockage in the brew group water inlet
• Worn or defective one-way valve in the water system
• Scale buildup in pump or heating element restricting water flow

• Verify the power cord is fully inserted into a working 120V outlet and the machine is powered on
• Remove and inspect the water tank for proper seating; ensure it clicks firmly into place
• Check that the water tank is filled to the minimum fill line with fresh, cold water
• Empty and rinse the drip tray completely to ensure no blockages
• Access and remove the brew unit according to your user manual and rinse it thoroughly under running water
• Check the bean container for any blockages or debris; ensure beans can flow freely to the grinder
• Run a complete descaling cycle using Miele-approved descaling solution to remove mineral deposits
• Power off the machine completely for 60 seconds, then power it back on to reset the system
• Run a test brew cycle with water only (no beans) to see if water flows properly
• Ensure the machine has adequate ventilation and is not in a location with extreme temperature fluctuations