Kac533

Hey folks! Just bought 96C210P and something weird with heat’s going on. Turn cab to heat and how but no heat or air coming out. Turn up fan but still no blowing thru and not hot. Then turn on Mac and to cold and it’s cold. Changes in fan speed react appropriately. However, stay on ac and turn to hot and it blows hot. So Why does it blow hot when in ac mode?
Why is there no fan output in heater mode (and no heat)? Oh, for a few breed seconds it mad a noise—sort of mid to low pitched.