E6
Monogram Communication Error Between UI Board and Main Control Board

Freezer displays E6; communication between user interface and main control may be lost; controls may be 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

Loose or oxidized data harness connector, damaged low-voltage communication cable, failed user interface board, failed main control board

How to Fix / Troubleshooting

Safety: Disconnect power before removing control panels or touching electronic boards.

  • Power cycle: Turn off power at the breaker for 5–10 minutes, then restore. If E6 returns, proceed with inspection.
  • Access user interface: Remove the control panel trim (often at the top of the door or inside the cabinet) to access the UI board.
  • Check harness connections: Reseat the ribbon cable or harness between the UI and main control. Ensure connectors are fully seated and locking tabs engaged.
  • Inspect cable: Look for kinks, cuts, or pinch points, especially where the harness passes through the cabinet or hinge area.
  • Board inspection: Examine both UI and main control boards for burnt components, corrosion, or moisture damage.

If reseating and inspecting the harness does not clear E6, either the UI board or main control board is likely defective. Board-level diagnosis and replacement are typically a level-4/5 repair and may be best handled by a Monogram-trained technician.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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