Bosch Dryer Error Code E:8

E:8 on a Bosch dryer indicates a condenser inlet NTC sensor error. The NTC is a temperature-sensing thermistor that monitors air temperature at the condenser inlet, and the control board has detected that the sensor signal is outside acceptable parameters. The dryer will not operate while this fault is active. On older Bosch models, this same fault was displayed as a 'door' error, so the description of the code depends on the model year.

No, you should not continue running the dryer while E:8 is active. The condenser inlet NTC sensor is part of the dryer's thermal monitoring system, and operating without reliable temperature data could allow internal temperatures to exceed safe limits. The dryer's control system halts the cycle specifically to prevent potential damage to components or a heat-related hazard.

A reset may temporarily clear the E:8 display, but the error will return if the underlying fault with the condenser inlet NTC sensor or its wiring has not been corrected. Resetting without addressing the root cause is not a reliable fix and could delay proper diagnosis. The correct approach is to inspect the cables and sensor before attempting any reset, and to replace the Power Unit if both check out correctly.

A knowledgeable DIYer can start by checking the wiring harness and connector terminals leading to the condenser inlet NTC sensor, as a loose or corroded connection is the most common cause. Testing the NTC sensor with a multimeter is also within reach for someone comfortable with basic electrical diagnostics. However, if the fault points to the Power Unit (control board), replacement of that component typically requires more advanced disassembly skills and familiarity with the unit's layout.

Repair costs vary depending on the root cause. If the issue is simply a loose or corroded wire connection, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing the NTC sensor is generally an affordable repair, often falling between $50 and $150 including parts and labor. If the Power Unit requires replacement, costs can range from $200 to $450 or more depending on the specific model and local labor rates.