I seem to recall other threads that mentioned this. My 2011 A126 doesn't do it. Furnace mode results in furnace only.
I'm wondering if maybe the factory is having the cool cat fan run to better circulate the heat from the furnace. If not they must be making a wiring mistake in the thermostat on a regular basis.
2011 FR Rockwood Premiere A126 Hard Side
TV=2011 Jeep Wrangler Sahara 2 Dr
Reese 66065 WDH, Curt WDH Shank #17120
Prodigy P2 Brake Controller, Mopar 7-pin Harness
B&M Transmission Cooler (#70268)