Dehumidifier shows E7 and will not start or shuts down shortly after starting.

Safety: Always unplug the unit before removing covers or touching internal components.

Steps:

• Power cycle: Unplug the unit for 10–15 minutes to allow capacitors to discharge, then plug back in. Sometimes this clears transient memory faults.
• Check power quality: Plug the unit directly into a properly grounded wall outlet (no extension cords or power strips). Voltage drops or surges can trigger memory errors.
• Surge protection: If E7 occurred after a storm or outage, consider using a surge protector in the future, but test the unit first directly on a known-good outlet.
• Board replacement: If E7 persists, the main control board is likely damaged. Replacement of the board is the only practical repair and is best performed by a qualified technician.