Bosch Refrigerator Error Code E15

E15 means the ambient temperature sensor is reporting a value outside the valid range, specifically at or above 60°C or at or below -55°C. Since these readings are not physically possible in a normal environment, the control board flags it as a sensor fault. The problem is typically a broken sensor, a short-circuit in the sensor wiring, or a loose connector. The refrigerator will continue to display this code until the underlying fault is corrected.

A failed ambient sensor can affect how efficiently the refrigerator manages its compressor and cooling cycles, since the control board relies on ambient temperature data to make adjustments. Running the unit for an extended period with this fault could lead to suboptimal cooling performance. It is best to address the error promptly rather than ignore it, particularly if food preservation is a concern.

Repair costs depend on whether the issue is a loose connector, damaged wiring, or a failed sensor. If only a connector needs reseating or cleaning, costs may be limited to a service call fee, typically in the range of $75 to $150. If the ambient temperature sensor itself needs replacement, parts and labor combined often fall in the range of $150 to $350 depending on the specific model and technician rates in your area.

Some causes of E15 are DIY-accessible, such as reseating a loose connector or inspecting visible wiring for damage. If the sensor itself has failed, replacing it requires locating the correct replacement part and basic electrical connector work. However, if the fault involves the wiring harness or control board, a qualified technician is recommended to avoid further damage.

A power reset may temporarily clear the E15 code from the display, but it will return as soon as the control board attempts to read the ambient sensor again and detects the same out-of-range value. The only way to permanently clear E15 is to repair or replace the faulty sensor or correct the wiring fault causing the invalid reading.