Samsung Range Error Code IGBT Sensor Open

This error indicates that the IGBT temperature sensor circuit within the Assy-Inverter Module is reading outside its valid range, specifically an A/D value above 239 or an ambient temperature below -10 degrees Celsius. The IGBT sensor monitors the power switching component used by the induction cooking system, and an open-circuit reading triggers the fault to protect the electronics. The root cause is typically a loose wire harness connection, a miswired harness, a failed sensor thermistor, or a defective control board.

You should not continue using the range with this error active. The IGBT sensor exists to prevent the power inverter from overheating during induction cooking. Operating the range without a functioning temperature sensor removes that protection and could result in damage to the inverter module or other electronic components. Discontinue use until the fault is diagnosed and resolved.

Repair costs vary depending on the failed component. If only the sub wire harness needs reseating, there may be no parts cost at all. Replacing the Assy-Inverter Module typically runs in the range of $80 to $200 or more for the part alone, depending on the specific model. Adding professional labor for diagnosis and installation can bring total repair costs to the range of $150 to $400. If the Assy Touch PCB is the defective component, costs will be in a similar range or higher.

A knowledgeable DIYer can perform the initial wiring checks without special tools. Inspect whether the sub wire harness between the Assy-Inverter Module and the Assy Touch PCB is fully connected and that the wire sequence matches the schematic. If wiring appears correct, measuring the sensor resistance with a multimeter (expecting approximately 10K ohms at 25 degrees Celsius) can confirm or rule out a failed thermistor. Replacing internal PCB components or the inverter module itself is more involved and may be better suited to a qualified technician.

A power reset may temporarily clear the error display, but if the underlying cause is a failed sensor, a wiring fault, or a defective PCB, the error will return once the range attempts to operate. Resetting without addressing the root cause does not repair the fault. A persistent return of the error after reset confirms that a physical component issue needs to be corrected.