I have an Aprilaire humidifier installed with a Rheem classic heat pump. The humidifier appears to run only when the back up gas heat is on. The humidifier does not come on when the heatpump is on. (Outdoor temp in both scenarios was about 35-37 degrees) Is this the way it's supposed to operate or is the humidifier wired incorrectly? If wired wrong I can call my installer back out to fix. Any help would be appreciated!

[Edited by bennyfranklin on 10-26-2005 at 01:48 PM]