Miele Washer Error Code F4025

F4025 means the control board has detected an impermissibly low resistance value at the NTC water temperature sensor circuit, which indicates a short circuit in the sensor or its wiring leads. The NTC sensor monitors water temperature throughout the wash cycle and feeds that data to the control board. When the resistance drops below the acceptable threshold, the machine shuts down to prevent unsafe operation. A multimeter is needed to determine whether the fault lies in the sensor itself or the wiring harness.

No, you should not attempt to continue using the washer while F4025 is active. A short-circuited temperature sensor means the control board cannot reliably monitor water temperature, which could result in overheating or improper cycle execution. The machine will typically refuse to operate in this condition, and the fault should be resolved before running any wash cycles.

A power reset may temporarily clear the displayed error code, but F4025 will return as soon as the washer attempts to read the NTC sensor again if the underlying short circuit has not been repaired. Resetting without fixing the fault does not resolve the problem and is not a reliable workaround. The short circuit in the sensor or wiring must be physically corrected to permanently clear this code.

A knowledgeable DIYer with a multimeter can perform resistance and continuity tests on the NTC sensor and its wiring harness to locate the short circuit. If the wiring is found to be pinched or chafed, repairing or rerouting the harness may resolve the fault. However, if the NTC sensor itself has failed internally, replacing the sensor requires accessing internal components, which may be more practical for a trained technician.

Repair costs depend on what component has failed. If only the wiring harness needs repair, costs are typically lower, ranging from around 75 to 150 dollars for a service call and labor. If the NTC sensor requires replacement, parts and labor combined generally fall in the range of 100 to 250 dollars. Miele appliances often carry higher service costs than standard brands due to the specialized parts and training involved.