Originally Posted by onehundred80
No, it does not control the cabin fan.
One of the solenoids in the RCM controls the air pump and the contacts get burnt on some of them. I have studied three RCM's and none where burnt, but there was a little silver dust under the air pump solenoid in one that I did notice. One of these solenoids is my spare that I got for $45, they cost $300+ at the stealership. 
The contact on mine was really bad. If your not getting a P0410 code then your pump and RCM are good.