Unit displays E5 and stops dehumidifying; fan may still run.

Safety: Disconnect power before removing any panels. The compressor and nearby components can be hot; allow the unit to cool for at least 20–30 minutes.

Steps:

• Allow cooling: If the unit has been running continuously in a hot room, turn it off and let it cool. After 30 minutes, restart and see if E5 clears.
• Clean condenser and filter: Remove and wash the air filter. Access the condenser coil and clean it thoroughly with a soft brush and vacuum. Good airflow is critical to prevent compressor overheating.
• Check condenser fan: Power the unit briefly (with covers in place where possible) and confirm the condenser fan starts and runs smoothly. If the fan does not run or is noisy, suspect the Argo condenser fan motor.
• Inspect wiring to compressor: With power disconnected, check the wiring harness to the compressor and its overload protector. Look for burnt connectors or loose terminals.
• Replace faulty parts: If the fan motor is not running or the overload protector is open (test with a multimeter), replace the Argo condenser fan motor or Argo compressor overload protector as needed.
• Test operation: Reassemble, restore power, and run the unit. If E5 recurs quickly, the compressor itself may be failing and will require professional service.