Good advise from Albert...
It sounds like you may the ground(green)/neutral(white) reversed or perhaps the feed(black)/neutral(white)reversed. The former condition would not be good. The outlets are "polarized" and the A/C unit could care very much about the polarity.
I'd go to home depot and buy a curcuit checker (about $10). You plug it in and it confirms yo have the green/white/b;ack all hooked up correctly/
It sounds like you may the ground(green)/neutral(white) reversed or perhaps the feed(black)/neutral(white)reversed. The former condition would not be good. The outlets are "polarized" and the A/C unit could care very much about the polarity.
I'd go to home depot and buy a curcuit checker (about $10). You plug it in and it confirms yo have the green/white/b;ack all hooked up correctly/