What you can check outside
Look at the outdoor unit before you call anyone. Clear away leaves, grass clippings or anything stacked against it, since the coil needs open air moving through it to work at all. Check that the fan on top spins freely and isn't grinding or rattling. Look at the coil itself, the fins running around the outside, for crushed or bent spots blocking airflow. None of this tells you what's broken, but it rules out the easy stuff before you pay someone to find it.







