Thanks nylyon. At first glance it looks like my switch is working as designed. I had hoped that I could try running the fan constantly at low speed while in heat mode to try and improve the heat distribution throughout the RV. Looks like that is not possible. I will look over the manuals more closely.
Grumpy, I believe that just the AC fan comes on high with no difference in speed while I move the slide. I will double check though if it is giving you a clue. Thanks for your help.