E6
Bosch
Communication Error Between Display Board and Main Control Board
Display shows E6 and the interior light or control panel behaves erratically
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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 data cable between display PCB and main PCB, Damaged harness in door hinge area, Oxidized or corroded connectors, Failed display PCB or main control board
How to Fix / Troubleshooting
Safety: Disconnect power before removing any panels or disconnecting cables.
Steps to address E6:
- Power cycle: Unplug the cooler for 5–10 minutes, then reconnect. If E6 returns, continue.
- Inspect harness: Remove the top or side trim to access the display/control panel. Follow the low-voltage harness from the display to the main control board (often routed through the cabinet or hinge area).
- Check connectors: Reseat all multi-pin connectors at both the display PCB and main PCB. Look for bent pins, corrosion, or moisture.
- Inspect for damage: Examine the harness for pinched or cut sections, especially where it passes through the door hinge or cabinet openings.
- Replace suspect board: If wiring is intact and reseated but E6 persists, either the display PCB or main control board may be defective. Replacement typically requires a Bosch-authorized technician to avoid damaging the appliance.
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Repair Difficulty
Hard
4/5
Required Part
Display Control Board
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