Miele Dishwasher Error Code F88

• Dishwasher stops mid-cycle and displays F88 error code on the control panel
• Water inside the dishwasher is noticeably cold or lukewarm during operation
• Error code appears intermittently or consistently across multiple wash cycles
• Dishes are not cleaning properly due to insufficient water temperature
• The dishwasher may drain completely and refuse to continue the cycle
• Heating element does not activate or makes unusual sounds

• Faulty heating element (most common cause in USA 120V models)
• Defective temperature sensor or thermistor in the heating circuit
• Loose or corroded electrical connections to the heating element
• Failed heating relay or electronic control board component
• Water inlet valve malfunction preventing hot water from entering
• Mineral buildup or scale on the heating element from hard water
• Wiring issues between the control board and heating system
• Tripped thermal overload protection due to heating system stress

• Check your home's circuit breaker panel to ensure the dishwasher's dedicated breaker is in the ON position; switch it OFF and back ON if tripped
• Verify the water inlet valve under your sink is fully open (turn the valve counterclockwise until it stops)
• Remove and inspect the fine mesh filter at the bottom of the dishwasher tub for debris or blockages; rinse thoroughly under running water
• Check both spray arms (upper and lower) for food particles or mineral deposits blocking the spray holes; use a toothpick to clear any visible clogs
• Ensure the dishwasher door is fully closed and latches securely with an audible click
• Perform a complete power reset by turning off the circuit breaker for 60 seconds, then switch it back ON to clear temporary electronic errors
• Verify your home water heater is functioning properly and hot water is reaching your kitchen sink normally