I know its hot in LA, for some reason it smells like dust / smoke.. Any idea what's going on.. ?? the system was checked last year. Its blowing cold air, but not what I am expecting it. I wish it would cool down a bit more. I can try replace the filter, i assume its on the air return. My parents are in Alaska, so im not sure what goes where, but i assume the filter is on the top of the stairs.. what looks like an air return.