What are the symptoms of error code E01?

Refrigerator displays E01 on the control panel, Fridge or freezer compartments not cooling properly, Compressor runs constantly or not at all, Temperature fluctuates or is inaccurate, Ice buildup around evaporator area

What causes error code E01?

Faulty temperature sensor (NTC) in fridge or freezer compartment, Loose or damaged wiring harness, Corroded or disconnected sensor plug, Control board misreading sensor values, Sudden power interruption causing sensor fault

How do I fix error code E01?

Power cycle the refrigerator to clear temporary sensor faults., Ensure vents and airflow channels are not blocked by food items., Inspect wiring and connectors for damage or corrosion., If the error persists, the temperature sensor or control board may require replacement.

Bosch Refrigerator - E01 Error Code

Cooling system or temperature sensor malfunction.

Meaning

Cooling system or temperature sensor malfunction.

The E01 error indicates that the refrigerator's cooling system is not operating correctly due to a temperature sensor (NTC) fault, wiring issue, or control board miscommunication. Bosch explains that this code appears when the sensor provides out-of-range readings, fails to report temperature changes, or loses connection with the control module. The refrigerator may stop cooling or run continuously to prevent food spoilage or compressor damage.

Symptoms

Refrigerator displays E01 on the control panel
Fridge or freezer compartments not cooling properly
Compressor runs constantly or not at all
Temperature fluctuates or is inaccurate
Ice buildup around evaporator area

Causes

Faulty temperature sensor (NTC) in fridge or freezer compartment
Loose or damaged wiring harness
Corroded or disconnected sensor plug
Control board misreading sensor values
Sudden power interruption causing sensor fault

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Step-by-Step Fixes

Power cycle the refrigerator to clear temporary sensor faults.
Ensure vents and airflow channels are not blocked by food items.
Inspect wiring and connectors for damage or corrosion.
If the error persists, the temperature sensor or control board may require replacement.

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Safety Notes

Unplug the refrigerator before inspecting internal components.
Avoid using sharp tools near wiring, insulation, or evaporator coils.
Do not operate the refrigerator if temperatures are unstable.

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Applicable Models

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French Door Series: B36CL80SNS, B36CL80ENS, B36CL80SNS/01, B36CL80SNS/02, B36CT80SNS, B36CT80ENS
800 Series Bottom Freezer: B36BT830NS, B36BT830SN, B36BT830SS, B36BT830NS/01
500 Series Bottom Freezer: B11CB50SSS, B11CB50SSS/01, B11CB81SSS
300 Series Bottom Freezer: B10CB80NVS, B10CB80NVS/01, B10CB81NVS
Benchmark Series: B36IT905NP, B36IT905NP/01, B30IR905SP, B30IR905SP/01, B24IR905SP
Built‑In Column Refrigerators: B30IR800SP, B30IR800SP/01, B24IR800SP, B24IR800SP/01
Side‑by‑Side Models: B20CS30SNS, B20CS30SNS/01, B20CS80SNS
Older Legacy Models: KAN58A45, KAN58A55, KAN58A75, KGN36XI45, KGN36AI45

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Other Bosch Refrigerator Error Codes

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Model-Specific Notes

Many Bosch B36 and B30 series refrigerators enter a protective cooling mode when E01 is detected, running the compressor at a fixed duty cycle until the sensor or wiring fault is resolved.

Disclaimer

The information provided on this page is for educational and informational purposes only. Repairs involve electrical, mechanical, and water-related risks. Always follow manufacturer instructions and consider contacting a qualified technician for diagnosis or repair.