E17
Siemens Internal Sensor Communication Fault

Microwave shows E17 and may stop mid-cycle with a beeping alarm.

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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

Loose connector to temperature or humidity sensor, damaged sensor harness, failed sensor bus on control board, moisture ingress in sensor area

How to Fix / Troubleshooting

Safety warning: Internal wiring and sensors are near live circuits. Only perform external drying and cleaning unless qualified.

Steps to try:

  • 1. Dry out: If heavy steam cooking was used, leave the door open for several hours to allow moisture to evaporate.
  • 2. Power reset: Disconnect power for 10 minutes, then reconnect and test a simple manual heating program.
  • 3. Avoid sensor modes: If manual modes work but E17 appears only on automatic programs, a sensor communication issue is likely.
  • 4. Technician-level: Inspect and reseat connectors to all sensors (NTC, humidity, etc.), check harness continuity, and replace the faulty sensor or control PCB.

Persistent E17 errors require professional diagnosis.

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Repair Difficulty

Hard 4/5

Required Part

Sensor Harness / Control PCB
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