Bosch Washer Error Code 37

Error code 37 on a Bosch washer indicates a break in the NTC temperature sensor circuit. The NTC thermistor monitors wash water temperature, and when the circuit is open the control board cannot receive a valid temperature reading. The washer stops operation and displays error 37 to alert you to this fault.

You should not continue running the washer while error 37 is active. Without a functioning temperature sensor, the control board cannot monitor or regulate water heating, which could lead to overheating or incorrect wash temperatures that may damage fabrics. The washer is designed to halt operation for this reason.

A reset may temporarily clear the error code display, but it will not resolve the underlying fault. If the NTC sensor or wiring harness is physically broken, the error will return as soon as the washer attempts to read the temperature sensor again. The broken component must be identified and repaired or replaced to permanently clear the code.

A knowledgeable DIYer can diagnose this error by visually inspecting the NTC sensor and wiring harness and using a multimeter to test for continuity and resistance. If a broken wire or loose connector is the cause, repairs may be straightforward. Replacing the NTC sensor itself is also a manageable task, but if the control board is faulty, professional service is recommended.

If only the NTC thermistor needs replacement, parts typically range from around $15 to $50 depending on the model, and the repair is relatively simple. If the wiring harness requires repair or replacement, costs vary based on the extent of the damage. A full service call including diagnosis and labor generally falls in the range of $100 to $250, and control board replacement would be at the higher end of the repair cost spectrum.