Miele Dishwasher Error Code F25

F25 on a Miele dishwasher means the appliance failed to reach the target water temperature within the required time during a heating stage, with a minimum threshold of 75 minutes. The control board monitors temperature rise throughout the cycle and triggers this fault when the water temperature plateaus below the setpoint. The heating element is the first component to inspect. Secondary causes include a faulty NTC temperature sensor, wiring faults, or a control board relay failure.

It is not recommended to continue running cycles with an active F25 fault. If the heating element is not functioning, dishes will not be properly cleaned or sanitized, which is a hygiene concern. The dishwasher may also repeatedly time out and halt mid-cycle. Resolving the underlying fault before running further cycles is the safest approach.

A reset may clear the fault code temporarily and allow the dishwasher to start a new cycle, but if the underlying component has failed, the F25 error will return once the heating stage is reached again. Resetting is useful for ruling out a one-time control glitch, but it does not address a failed heater, sensor, or wiring problem. Persistent F25 errors require proper diagnosis and component repair or replacement.

Some steps are accessible to a knowledgeable DIYer. You can check the water supply for adequate pressure and inspect wiring connections to the heater for obvious damage or corrosion. Testing and replacing the heating element or NTC sensor requires basic electrical knowledge and a multimeter. If the control board is the source of the fault, professional repair or board replacement is typically the better route.

Repair costs vary depending on the failed component and whether you hire a technician. Replacing a heating element yourself typically costs in the range of $50 to $150 for the part alone. An NTC temperature sensor is generally less expensive, often in the $20 to $60 range. Professional labor adds to these figures, and a control board replacement is the most expensive scenario, potentially ranging from $200 to $500 or more including labor.