If you plugged it into a dimmer you might of blown the circuit control board. From the manual there isn't an internal fuse but if it's not working and out of warranty crack it open and see if there is an internal fuse. That's best case scenario. Worst you shot the board and have to replace it.
This is what one of our small Chauvet moving heads did when the main PCB took a crap. The fans would kick on when energized, but no other response.
We have the same hazers and have had nothing but problems. One leaked out of the box, but made decent haze. The second one made dense clouds that didn't disperse well. Tried fans and that helped a little but often pushed the haze too far or too fast. One has now taken a dump, I think the check valve went bad so it pumps the fluid up, which immediately drains back into the hose instead of going into the machine. Haven't been able to get parts thus far. I think we're going to give the working one to the youth, keep trying to fix the 2nd, and buy 2 Antari HZ350s.