Wiring a dedicated line

I just put a didicated line in myself for my stereo. The stereo works fine but if I plug an air conditioner into it the fan in the ac unit wont come on but the lights and refridgeration unit do. The fan works in the ac unit when pluged into a different line.

Did I wire it wrong? Is the ac unit getting some power but not enough to run the fan?

I have wired before but never had this problem.

Any help would be great.