Bosch Dryer Error Code E:08

E:08 indicates that the drum temperature NTC sensor at the drying tunnel inlet has been detected as defective by the control board. This sensor monitors the air temperature entering the drum and is critical for safe heating regulation. The fault can be caused by a failed sensor, damaged wiring, or a poor electrical connection along the harness. The dryer will typically stop normal operation until the fault is resolved.

Running the dryer with an active E:08 fault is not recommended. The inlet NTC sensor is part of the thermal control system, and without accurate temperature data, the dryer cannot regulate heat properly. This could lead to overheating or inadequate drying performance. It is best to stop using the dryer until the sensor fault is diagnosed and corrected.

Repair costs vary depending on whether the issue is a wiring or connector problem versus a failed NTC sensor. If only the wire harness or connectors need attention, costs may be minimal, primarily for labor if a technician is involved. If the NTC sensor itself needs replacement, parts typically range from around $15 to $60 depending on the specific model, plus any applicable labor costs. A service call from a technician to diagnose and repair this fault generally ranges from $100 to $250 in total.

A knowledgeable DIYer can attempt this repair by first inspecting the NTC wire harness and connectors for visible damage or loose connections, as these are the most common causes. If the wiring looks intact, testing the NTC sensor's resistance with a multimeter will confirm whether the sensor itself has failed. Replacing the drying tunnel inlet NTC is a straightforward component swap once the dryer is safely unplugged and disassembled. If the wiring and sensor both test correctly, a control board issue may be involved, which is more complex to diagnose.

A power reset may temporarily clear the E:08 code, but if the underlying fault is still present, the error will return once the dryer runs again and the control board re-checks the NTC circuit. A reset does not repair a failed sensor or damaged wiring. A lasting fix requires physically inspecting and correcting the root cause of the fault.