My 2001 Safari AC did not have an automatic selection. It had Low and High heat, and Low and High Cool on one switch and a thermostat (that only worked in cool mode). My 2002 Classic has the Comfort Control Center thermostat. The mode button cycles between OFF, FAN ONLY, COOL, HEAT PUMP and FURNACE modes. The FAN switch had AUTO, LOW, and HIGH. In AUTO mode, the fan would turn on and off as directed by the thermostat. In LOW and HIGH, the fan ran continuously and the heating or cooling was controlled by the MODE switch setting and the thermostat UP and DOWN buttons.
We regularly ran the unit in HIGH or LOW fan setting in COOL mode with no problems. It ran almost continuously for two weeks on the Cajun Country Caravan and a week on the Galax Special event rally.
The technician you spoke with was misinformed or simply not correct, at least from my experience.
"You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
2001 Safari 25 RB Twin (Gone, but not forgotten)
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
WBCCI 1322, TAC FL-39, AIR 82265