A5 - Heating or freeze protection active

What does A5 mean?

The air conditioner is in a protection mode, either for heating or to prevent freezing during cooling.

• Poor airflow.
• Short circuit.
• EEV (Electronic Expansion Valve) issue.
• Incorrect refrigerant charge.
• Indoor coil sensor has an incorrect value.

Click steps to track your progress.

1. 1

   Check and clean the air filters of the indoor unit.

2. 2

   Ensure there are no obstructions to airflow around the indoor unit.

3. 3

   Verify the indoor coil sensor is properly connected and undamaged.

4. 4

   Contact a qualified technician for checks on EEV, refrigerant charge, and airflow.