Bosch Refrigerator Error Code E9010

Error code E9010 on a Bosch refrigerator indicates a fault with compartment temperature sensor 2, specifically an open circuit or short circuit condition. Temperature sensors in Bosch refrigerators are typically negative temperature coefficient (NTC) thermistors, meaning their electrical resistance changes predictably as temperature changes. When the control board reads a resistance value that falls outside the expected range, either too high (indicating an open circuit where the circuit is broken) or too low (indicating a short circuit where conductors are contacting each other), it logs this fault code and may disable cooling or enter a protective mode to prevent food spoilage or component damage.

Compartment temperature sensor 2 is a secondary sensor used to monitor a specific zone within the refrigerator, such as a separate drawer compartment, the freezer section, or a humidity-controlled zone depending on the model configuration. The sensor communicates continuously with the main control board, and any disruption to that signal path triggers E9010. The fault can originate at the sensor itself, at the wiring harness connecting the sensor to the board, or at the control board input circuit.

The most common physical causes include a sensor that has failed internally due to age or moisture exposure, a wiring harness that has developed a break or pinch point from normal door cycling, or a connector that has corroded or loosened over time. In colder compartments, condensation can accelerate corrosion at connector terminals. Diagnosing this code accurately requires measuring the sensor's resistance across its terminals and comparing the reading against the temperature-resistance chart for that specific sensor.