E17
Bosch Milk System / Carafe Detection Fault

Machine shows E17; often related to milk system or carafe not detected.

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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

Dirty or blocked milk connector, Faulty milk carafe sensor, Misaligned milk container, Damaged O-rings on milk coupling

How to Fix / Troubleshooting

Safety first: Unplug the machine before handling internal milk connectors. Milk residues can harbor bacteria; use appropriate cleaners.

  • Clean milk carafe and connectors: Disassemble the milk carafe (if applicable) and clean all parts with warm soapy water. Pay attention to the suction tube and connector.
  • Run milk system cleaning program: Use Bosch milk system cleaner according to the manual to flush internal milk lines.
  • Inspect O-rings: Check the rubber O-rings on the milk connector at the front of the machine for cracks or flattening. Replace if damaged.
  • Ensure proper seating: Reattach the milk carafe or hose firmly until it clicks into place.
  • If E17 remains: The milk system detection sensor or internal milk valve may be faulty. Professional service is recommended.
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Repair Difficulty

Medium 3/5

Required Part

Milk Connector Assembly
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