Safety: Unplug the unit before removing the control panel or back cover.

Steps:

Power reset: Unplug for 5–10 minutes, then plug back in. If E6 returns, proceed.
Access control boards: Remove the bucket and front grille. Unscrew and gently lift the top control panel. On some Insignia models, the main control board is behind the rear panel; remove screws to access it.
Inspect harness: Locate the multi-wire harness connecting the display board to the main board. Check for pinched, cut, or loose wires.
Reseat connectors: Disconnect the harness at both ends and reconnect firmly. Ensure no pins are bent or pushed back.
Check for corrosion: If you see green/white corrosion on connectors, clean carefully with contact cleaner and a soft brush, then let dry completely.
Test operation: Reassemble enough to safely power the unit and see if E6 clears.
Board replacement: If E6 persists, either the display board or main control board is likely defective. Replace the suspect board with an Insignia-compatible replacement for your exact model.

Note: Board-level repairs (soldering components) are not recommended for most homeowners; replacing the entire board is the standard approach.

Dehumidifier displays E6 and stops operating

Possible Causes