Bosch Dryer Error Code E:1302

Error code E:1302 on a Bosch dryer indicates a fault within the Refresher function's NTC temperature sensor circuit. The Refresher is a steam-based or gentle-air cycle used to dewrinkle and freshen garments without a full wash. The NTC (Negative Temperature Coefficient) thermistor is a resistive sensor that monitors temperature inside the drum or air path during this cycle. As temperature rises, the NTC's resistance drops in a predictable curve, allowing the control board to regulate heat accurately. When the board reads a value outside the expected resistance range, either too high or too low, it flags E:1302 to protect the cycle from operating at incorrect temperatures.

This code is the 4-digit equivalent of E:85, meaning both codes point to the same underlying fault in the same sensor circuit. The most direct diagnostic starting point is measuring the NTC's resistance with a multimeter and verifying that the reading corresponds to the expected value for the ambient or operating temperature. A fully open circuit typically indicates a broken sensor or severed wire, while a short to ground produces a near-zero resistance reading. Either condition will trigger this error.

Causes range from a failed NTC thermistor to loose or corroded connector pins at the sensor harness. Wiring damage from heat exposure or mechanical wear is also possible, particularly in the harness routing near moving drum components. Because the Refresher cycle relies on precise temperature control, the control board will not allow the cycle to complete normally while this fault is active. Resolving E:1302 requires confirming sensor resistance, inspecting all associated wiring, and replacing any components that fall outside specification.