mirekti

Here's my story. I installed remote starter, and basically want to use it in winter and hot summer days in a way that I set the heating to high, fan high and airflow inside.
For some reason I am not able to understand the computer or behavior of the board.
When I set the airflow to inside, and the fan is off turning the key off and on keeps the airflow inside engaged. However, if I leave the fan on, and keep the airflow inside engaged, turn the engine off and on again, the fan starts blowing but the inside airflow led goes off. I can swear I saw it actually working i.e. the led stays on after the vehicle is shut down and started again, but it doesn't behave like this anymore.
Does anyone know what is going on, what kind of condition makes car's computer to turn the inside airflow on or off by itself?