E05
Bosch Refrigerator
Severity:What Does This Error Mean?
E05 on a Bosch refrigerator indicates a fault with the ambient temperature sensor — the sensor that monitors the room temperature outside the fridge. The fridge uses this reading to adjust its cooling performance in very hot or cold rooms. E05 does not usually stop the fridge from working, but the unit may be less efficient.
Affected Models
- Bosch Series 4 Refrigerator
- Bosch Series 6 Refrigerator
- Bosch Series 8 Refrigerator
- Bosch Benchmark Series Refrigerator
Common Causes
- Ambient temperature sensor (NTC thermistor) has failed
- Sensor connector loose or corroded on the main PCB
- Sensor located in an unusual position — near a heat source or direct sunlight — giving false readings
- Control board fault causing incorrect interpretation of the sensor signal
How to Fix It
-
Unplug the refrigerator for 10 minutes, then restore power.
A transient sensor error can sometimes clear with a reset. If E05 does not return, monitor the fridge over the following days.
-
Check the location of the fridge.
If the refrigerator is near a window with direct sunlight or next to an oven, the ambient sensor may be reading high. Relocating the fridge or adding shade can resolve false E05 alerts.
-
If E05 persists, book a Bosch service visit.
The technician will test the ambient sensor and replace it if faulty. It is a small, inexpensive part and a quick repair.
When to Call a Professional
E05 is a low-priority repair but should not be ignored indefinitely. In very hot summer conditions, the fridge may struggle to maintain temperature without ambient compensation. A technician can replace the sensor in a short visit.
Frequently Asked Questions
Will E05 affect my food?
Usually not immediately. The fridge will still cool, but it may be less efficient in extreme room temperatures. Monitor the actual fridge temperature with a thermometer to be sure.
Where is the ambient temperature sensor on a Bosch fridge?
On most Bosch models, the ambient sensor is located near the compressor at the bottom rear of the fridge, or just inside the machine room compartment. It measures the temperature of the air around the condenser area.