Error 20 — Indoor thermal overload

What does 20 mean?

The indoor unit has experienced a thermal overload condition. This typically relates to airflow or operational issues within the indoor unit.

• Blockage of airflow to the indoor unit
• Indoor unit fan motor issue

Click steps to track your progress.

1. 1

   Check and clean air filters for the indoor unit.

2. 2

   Ensure vents and air returns are not blocked.

3. 3

   Inspect the indoor fan motor.

4. 4

   Verify the indoor unit is operating within normal parameters.