Miele Washer Error Code F4136

F4136 indicates a fault in the heating system NTC 1 circuit. It means the control board has detected either an open-circuit condition in the NTC 1 temperature sensor or that relay contacts 13/14 on relays 1K1/1 and/or 2K1/1 have closed outside the designated heating phase. The machine triggers this code to prevent uncontrolled or unmonitored heating.

It is not advisable to continue running the washer while F4136 is active. The fault indicates the heating system cannot be properly monitored or controlled, which means water temperature may be unregulated. Continuing to run cycles could result in poor wash performance and potentially damage to fabrics or the machine itself.

A reset may temporarily clear the code from the display, but if the underlying fault, whether a failed sensor, damaged wiring, or a malfunctioning relay, has not been corrected, the error will return when the machine attempts a heating cycle again. A reset alone is not a repair and should only be used as a diagnostic step to observe whether the fault recurs.

Some steps, such as inspecting visible wiring, checking connector terminals, and resetting the machine, can be done by a knowledgeable DIYer. However, accurately diagnosing an open-circuit sensor versus a relay fault requires a multimeter and familiarity with reading electrical schematics. Relay and control board replacement should generally be handled by a qualified technician to avoid further damage.

Repair costs depend on the root cause. Replacing an NTC temperature sensor typically falls in the range of $50 to $150 for parts, plus labor. Relay replacement costs vary depending on whether the relay is a standalone component or part of a larger assembly. Control board replacement is the most expensive scenario, often ranging from $200 to $500 or more for parts alone.