Blomberg
User Interface / Start Circuit Fault
Oven will not start; display is on but pressing Start or selecting a function does nothing.
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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
Faulty Start button on touch panel, child lock active, defective function selector, communication failure between UI and main PCB
How to Fix / Troubleshooting
Safety first: For control checks, you may need power on; avoid touching live parts. Disconnect power before removing panels.
- Check child lock: Ensure the child lock is not active by following the unlock procedure in the manual.
- Try different modes: Attempt to start various functions to see if any respond; this can help isolate selector vs. Start key issues.
- Inspect touch panel: If the Start key is unresponsive while others work, the touch control panel may be faulty and require replacement.
- Selector switch (knob models): Test the function selector for continuity in each position. Replace if it does not send the correct signals.
- Check UI-to-PCB cable: Reseat the ribbon cable between the user interface and main control board.
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Repair Difficulty
Medium
3/5
Required Part
Touch Control Panel / User Interface Board
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