Bosch Washer Error Code 38

Error code 38 on a Bosch washer indicates a short-circuit in the NTC temperature sensor circuit, and the error description states the NTC is broken. The NTC thermistor monitors water temperature during the wash cycle, and when a short is detected, the control board stops the machine to prevent unsafe operation. The fault points to either the sensor itself or the wire harness connected to it.

No, the washer should not be operated while error 38 is active. Without a functioning temperature sensor, the machine cannot monitor water temperature, which means it cannot control heating safely. The washer will typically refuse to run cycles until the fault is resolved.

If only the NTC thermistor needs replacement, parts are generally inexpensive, typically in the range of $15 to $50 depending on the model, with additional labor costs if a technician is hired. If the wire harness or connectors are damaged, repair costs vary based on the extent of the damage and whether the harness can be repaired or must be replaced. A professional diagnosis visit generally adds $75 to $150 before parts and repair labor.

Start by inspecting the NTC sensor and its wire harness for visible damage, corrosion, or pinched wiring. Disconnect the NTC sensor and use a multimeter to measure its resistance: a reading near zero ohms confirms an internal short and means the sensor needs replacement. If the sensor reads correctly, trace the harness to find any short in the wiring or connectors. Replacing the faulty component should clear the error.

A reset may temporarily clear the displayed error, but it will return as soon as the control board checks the NTC circuit again and detects the short. The underlying hardware fault in the sensor or wiring must be repaired for the error to stay cleared. Resetting without fixing the root cause is not a solution.