Error Code E104
Bosch oven and steamer
Oven/Steam Oven Error Code E104: Temperature Sensor Problem
Does your Bosch, Siemens, Neff, Constructa, or Gaggenau oven or steam oven display error code E104? This indicates a problem with the temperature sensor inside the oven cavity. This could be a short circuit or an open circuit in the sensor or its wiring.
What does error code E104 mean? Error code E104 signifies a short circuit or open circuit in the temperature sensor (e.g., PT1000 or PT500) within the oven. The appliance may stop heating, and the fan might run at high speed to prevent overheating. After two consecutive correct temperature measurements, the oven will resume normal operation.
Possible Causes:
- Defective temperature sensor: A damaged sensor may provide incorrect readings or cause a short circuit.
- Open circuit or short circuit in the wiring: Damaged cables or loose connections between the sensor and the control board can cause the error.
- Defective control board: A fault in the electronics can impede the processing of sensor signals.
Solution:
- Turn off the oven and unplug it from the power outlet.
- Visual inspection: Check the wiring and connections of the temperature sensor for any visible damage or loose connections.
- Check the temperature sensor: Measure the resistance of the sensor using a multimeter. Compare the readings with the manufacturer’s specifications. Replace the sensor if it falls outside the specified tolerance values.
- Check the control board: Inspect the control board for any visible damage or burnt components. If you suspect a defect, have the control board checked or replaced by a professional.
- Reset the oven: Reconnect the oven to the power supply and perform a reset according to the user manual to clear the error code.
When to Call a Technician? If error code E104 remains visible after performing the steps above, or if you are unsure, please contact customer service. A qualified technician can provide an accurate diagnosis and carry out the necessary repairs.
Conclusion: Error code E104 points to issues with the temperature sensor or its wiring. Thoroughly checking the sensor, wiring, and control board can help identify and resolve many causes. If problems persist, contact a professional.
