RUN light blinks (1.5 seconds ON, 0.5 seconds OFF) — Airflow stopped to prevent cold air in heating operation

What does RUN light blink (1.5s ON, 0.5s OFF) mean?

During heating operation, the green RUN light on the indoor unit will blink with a pattern of 1.5 seconds ON and 0.5 seconds OFF. This indicates that the airflow is temporarily stopped to prevent cold air from blowing out.

• Unit is in heating mode and temporarily stopping airflow to prevent cold drafts.
• Normal operation characteristic during heating to optimize comfort.

Click steps to track your progress.

1. 1

   Allow the unit to continue heating operation; this is normal behavior.

2. 2

   Do not switch off the unit, as it is managing its internal temperature.

3. 3

   If the issue persists or heating performance is poor, ensure filters are clean.