AIRCARE dehumidifier shows E8 and will not operate.

Safety first: Unplug the dehumidifier before servicing. Electronic boards are sensitive to static; ground yourself before touching them.

• Step 1 – Power cycle: Unplug the unit for at least 15 minutes to fully discharge the board. Plug back in and check if E8 clears.
• Step 2 – Check supply voltage: Ensure the outlet provides stable voltage (typically 120V AC). Avoid using long, undersized extension cords that can cause voltage drops.
• Step 3 – Inspect board connections: Remove the control panel or rear cover to access the main PCB. Verify all harnesses are firmly seated and there are no burnt components or traces.
• Step 4 – Surge protection: If E8 occurred after a storm or outage, consider using a surge protector in the future. However, the current board may already be damaged.
• Step 5 – Replace main control board: If E8 persists and there is no visible wiring issue, replace the main control board with the exact AIRCARE replacement for your model. Transfer each connector one at a time to avoid miswiring.
• Step 6 – Reassemble and test: Reinstall covers, plug in, and test. Confirm that E8 is cleared and all functions operate normally.

EEPROM errors almost always require board replacement; there is no field reset for corrupted firmware.