E17
Bosch
Low Temperature / Sensor or Control Overshoot
E17 error: A low temperature alarm or risk of over-freezing (very low internal temperature).
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
A stuck relay on the main control board keeping the compressor on, a shorted temperature sensor reading too warm, an incorrectly installed sensor, or a control module logic fault.
How to Fix / Troubleshooting
Safety: Unplug the freezer before accessing control electronics.
Steps:
- Verify temperature: Use a thermometer to confirm the actual freezer temperature. If it is far below the setpoint, there is an overcooling issue.
- Check settings: Ensure the set temperature is not accidentally set to the lowest possible value or if SuperFreeze was left on.
- Inspect sensor: Test the freezer NTC sensor resistance and compare it to specifications. Replace if readings are incorrect.
- Control board inspection: If the sensor is correct, the compressor relay on the main board may be stuck closed. Inspect for welded relay contacts or burn marks.
- Replace control module: If the relay is faulty or the board is damaged, replace the main control module.
Tip: Extremely low temperatures can damage some food items and increase energy consumption; resolve this promptly.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Module
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