Air conditioner not blowing air
The LG split unit I installed had a micro switch in the cover that stops the fan motor while the cover is open, make sure the filters are seated and the covers closed. If the fan still won't start you will need to check the control board for error codes. It's been a few years but I remember that switch was a pain.  Added from memory there are a couple of things that will stop the unit from working, dirty filters high liquid level (drain plugged) filters not seated door not fully closing. I am sure there were more there should be an owners manual it has a troubleshooting guide with quite a few pages of problems and solutions in the back but it has been a while.