'your fans should come on if your AC comes on'
I have recently discovered that is not necessarily true. If cold during winter the fans OFTEN do not come on with a/c , it will work by itself. The PCM regulating something there. After putting LEDs on low and high fan and a/c compressor itself I found that out, same on both my focus cars. Now, during summer, fans do pretty much come on with the a/c.