F11
Miele
Communication Bus Fault (UI to Main Control)
Oven shows communication error between display module and power electronics; functions may be limited or disabled.
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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 or damaged communication harness, Faulty display module, Faulty main control module, Electrical noise or interference on data lines
How to Fix / Troubleshooting
Safety first: Isolate the oven from mains power before accessing internal electronics.
- Inspect harness connections: Locate the multi-core harness between the display/UI board and the main control. Disconnect and reconnect both ends to ensure solid contact.
- Check for damage: Look for pinched, cut, or heat-damaged wires along the harness route. Replace the harness if any conductors are compromised.
- Module substitution: If wiring is intact, either the display module or main control may be defective. In practice, technicians often start by replacing the display/UI module, then the main control if the fault persists.
Because communication faults can be subtle and model-specific, professional diagnosis with Miele service tools is recommended.
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Repair Difficulty
Professional Required
5/5
Required Part
Display Module Harness / Main Control Module
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