Bosch Dishwasher Error Code Turbidity Temp Sensor

This error means the control board has detected that the turbidity and temperature thermistor circuit is shorted, open, or stuck at a constant value. The sensor is responsible for measuring both water clarity and water temperature during the wash cycle. When the sensor signal is outside expected parameters, the dishwasher logs this fault and may interrupt operation. The problem can be caused by a failed sensor, damaged wiring, or corroded connectors.

Running the dishwasher with this error active is not recommended. Without accurate temperature and turbidity data, the dishwasher cannot properly regulate wash cycles, which means dishes may not be sanitized or cleaned effectively. In some cases the machine will stop mid-cycle on its own as a protective measure.

A reset may temporarily clear the error code, but it will return as soon as the control board runs its diagnostic check and detects the faulty sensor signal again. Resetting does not address the underlying hardware problem. The error will continue to appear until the failed thermistor, damaged wiring, or other root cause is physically repaired or replaced.

A knowledgeable DIYer can handle this repair by first inspecting the sensor connector for corrosion or loose pins and testing the thermistor resistance with a multimeter. If the sensor tests faulty, replacing the turbidity and temperature thermistor is a straightforward component swap. However, if the wiring harness is damaged or the control board is suspect, the repair becomes more involved and may require a technician.

If the thermistor itself needs replacement, parts typically range from $20 to $80 depending on the specific model. If a technician is performing the repair, total labor and parts costs generally fall between $100 and $250. A control board replacement, if required, can push costs significantly higher, often in the $200 to $500 range for parts and labor.