E18
Bosch
Ambient Temperature / Sensor Fault
E18 displayed; ice maker disabled due to ambient temperature out of range (often in garage or unheated space).
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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
Ambient temperature sensor out of range, Refrigerator installed in environment below manufacturer spec, Faulty ambient NTC sensor on control board
How to Fix / Troubleshooting
Safety: Disconnect power before accessing control areas.
- Check installation location: Bosch refrigerators and ice makers are designed for indoor, climate‑controlled environments. If installed in a garage or very cold room, the ice maker may be disabled.
- Measure ambient temperature: Use a thermometer near the appliance. If below ~10°C (50°F) or above ~38°C (100°F), relocate the unit or improve room conditioning.
- Inspect ambient sensor: On some models, an ambient NTC sensor is mounted near the condenser or control area. Check wiring and connector for damage.
- Test sensor: Measure resistance and compare to Bosch spec at room temperature. Replace if out of range.
- Reset control: After correcting environment or replacing the sensor, power cycle the unit and monitor for error clearance.
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Repair Difficulty
Medium
3/5
Required Part
Bosch Ambient Temperature Sensor
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