Heater

Sorry if this is posted twice-can't find my original post.  When my heater comes on, cool air blows out of the AC unit.  I was told elsewhere that this is to recirculate the air.  However, when I had a Class C Motorhome, this didn't happen and the r-pod is small enough it doesn't seem like this is necessary.  I would like to turn this feature off as the air is cool/lukewarm only.  Is this how the heater normally runs?  Is there any way to turn it off?  Thanks

Thanks a bunch. It worked