Bosch Refrigerator Error Code iD

The iD code indicates that the IDUCT sensor, which monitors temperature in the refrigerator's air duct near the evaporator, has been detected as disconnected or short-circuited by the Main PCB. The control board uses this sensor to regulate cold air distribution into the fresh food compartment. When the sensor circuit fails either open or shorted, the board logs this fault and displays the iD code. The sensor located on the evaporator will need to be tested and likely replaced.

Operating the refrigerator with an active iD fault means the control board is working without valid temperature data from the IDUCT sensor, which can compromise its ability to maintain consistent temperatures in the fresh food section. Food safety may be at risk if cooling cycles are not regulated properly. It is advisable to monitor internal temperatures closely with a thermometer and have the fault repaired promptly rather than relying on the unit long-term in this condition.

Performing a power reset by unplugging the refrigerator for several minutes may temporarily clear the displayed code, but the iD fault will return if the underlying IDUCT sensor issue has not been corrected. The control board will re-detect the open or shorted sensor circuit as soon as it runs its diagnostic checks. A reset is not a repair and should only be used to confirm whether the fault is persistent. The sensor circuit must be tested and the faulty component replaced to permanently resolve the error.

A knowledgeable DIYer with a multimeter can perform the initial diagnostic by disconnecting connector CN15 from the Main PCB and measuring resistance across the IDUCT sensor terminals. If the reading shows an open or shorted circuit, the sensor on the evaporator needs to be replaced. Accessing the evaporator typically requires removing interior panels, so comfort with appliance disassembly is necessary. If the wiring and sensor both test acceptable, the issue may involve the Main PCB, which is best handled by a qualified technician.

If only the IDUCT sensor needs replacement, parts costs typically fall in the range of $20 to $80 depending on the specific model, with labor adding $75 to $200 depending on your location and service provider. If the Main PCB is determined to be faulty, costs can rise significantly, generally ranging from $200 to $500 or more for the board plus labor. Getting a diagnostic assessment from a technician before committing to repairs is the best approach.