My AC is blowing hot air when my car is not moving. Basically got my car today. AC worked great while driving on the highway. Parked it for an hour and it hasn't really been cold since. I tried to cool the car off using the app but it didn't work. I live in Miami and I like to sit in the car with AC on blast and this is getting frustrating. Also when I pull up to a light or stop sign it feels hot again.