C-31
Samsung
Control Panel Key Input Error
Oven displays C-31 and controls may freeze or become unresponsive.
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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
Stuck or shorted touchpad key, Contaminated touch panel (spills, cleaners), Damaged touch control panel, Faulty UI-to-main PCB interface
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before cleaning or disassembly.
- Clean the control surface:
- With power off, wipe the touch panel with a slightly damp, non‑abrasive cloth.
- Remove any sticky residue or dried spills around frequently used keys.
- Dry thoroughly before restoring power.
- Power cycle: Restore power and test each key. If the same key is unresponsive or triggers the error, the touch panel is likely faulty.
- Inspect ribbon cable:
- Remove the control panel and check the ribbon cable for damage.
- Reseat the cable firmly in both the UI and main PCB connectors.
- Replace the touch panel: If specific keys remain stuck or non‑functional, replace the touch control panel assembly.
- If issue persists after panel replacement: The main PCB may have a defective key scan circuit and should be replaced by a professional.
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Repair Difficulty
Medium
3/5
Required Part
Touch Control Panel
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