Miele Washer Error Code F4024

F4024 means the control board is detecting an impermissibly high value from the NTC temperature sensor circuit, which indicates an open circuit condition. This typically points to a failed thermistor, a broken wire in the sensor harness, or a disconnected connector. The washer stops operation because it cannot confirm water temperature, which is required for safe and accurate cycle control.

You should not operate the washer while F4024 is active. Without a valid temperature sensor reading, the machine cannot regulate water temperature accurately, which could result in improper washing performance or potential damage to fabrics. Miele's control system halts operation for this reason.

Start by locating the NTC temperature sensor and disconnecting it from the harness. Use a multimeter set to resistance mode and probe across the sensor terminals. A failed sensor in an open-circuit condition will show no reading or infinite resistance rather than a finite value. If the sensor reads correctly, perform a continuity test along the entire wiring harness from the sensor to the control board, checking each connector for secure seating and corrosion along the way.

Power cycling the washer may temporarily clear the display, but the F4024 code will return as soon as the control board attempts to read the NTC sensor again. The underlying open-circuit fault in the sensor or harness must be diagnosed and repaired before the error will stay cleared permanently.

Repair costs depend on the root cause. If only a connector needs reseating or cleaning, there may be little to no parts cost, though a service call typically runs in the range of $100 to $200. Replacing the NTC thermistor sensor itself is generally a moderately priced repair with parts often in the $20 to $80 range plus labor. If the control board is the cause, parts and labor costs can climb to $300 to $600 or more.