Samsung Refrigerator Error Code 90E — Communication Error Between Main and Display PCB
What this means
The 90E error code indicates a communication failure between the main control board (usually located at the back of the refrigerator) and the user interface display panel (on the front door). This can be caused by a loose or damaged wire harness running through the door hinge, a faulty display board, a faulty main board, or a power surge. The display may show garbled characters, go blank, or freeze on this error code.
Alternate codes: 90C
Step-by-step fix
4 stepsPower cycle the refrigerator
Unplug for 5 minutes, then restore power. If the display comes back normally and the code clears, a power surge or temporary glitch was likely the cause.
If you recently experienced a power outage, this code is common and often clears with a reset.
Inspect the wire harness at the door hinge
The communication cable runs from the main board through the top hinge area and into the door where the display is mounted. Check this harness for pinched, frayed, or broken wires, especially where it flexes at the hinge.
Opening and closing the door tens of thousands of times can fatigue the wires at the hinge point. This is a very common failure location.
Reseat connectors on both boards
Unplug the fridge. Remove the top cover to access the main board connector for the display harness. Also remove the display panel cover on the door to access its connector. Disconnect and firmly reseat both connectors.
Look for burned or corroded pins on the connectors — these indicate a poor connection that was generating heat.
Test the wire harness for continuity
With both ends of the harness disconnected, test each wire for continuity from end to end using a multimeter. A broken wire will show OL.
If one wire is broken, the entire harness should be replaced rather than splicing, as the hinge area will stress a splice.
When to call a professional
If the harness is intact and connectors are clean but the error persists, either the display board or main control board has failed. A technician can determine which board is at fault by swapping them one at a time.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Door Wire Harness
Part #DA96-00764C · $20–$45
If any wire in the harness fails continuity test
Display Panel Board
Part #DA92-00594B · $60–$150
If harness is good but display does not communicate
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