E404 — Outdoor Overload Protection Control Active when Compressor Stops

What does E404 mean?

This error signifies that the outdoor unit's overload protection has activated while the compressor is stopped, likely due to issues with the fan, electronic expansion valve (EEV), or temperature sensors.

• Outdoor unit fan or motor not operating normally.
• Malfunction of the Electronic Expansion Valve (EEV).
• Problem with the indoor unit heat exchanger temperature sensor.
• Blocked indoor unit air inlet.

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power switch or circuit breaker and wait 30 seconds.

2. 2

   Confirm that the outdoor unit's fan is operating without obstruction.

3. 3

   Check the indoor unit's air filters and ensure the inlet is clear for proper airflow.

4. 4

   Restore power. If the issue continues, contact customer support.