I have a good understanding that this my not work exactly how it should but i would think that i should get some kinda air.. I realize the doors (actuators) may be working backwards but why should it matter? i get absolutely no air out of any vents! all i want is heat! lol
also this is a 2001 gmc sonoma i just made this fiberglass box and covered over the hole for the heater core everything else is stock. the hole that used to be where the blower motor sat is welded up solid
That setup won't work . You need the intake hole that u shaved up ,it sucks air in from that hole and pushs it in the hole u have your box mounted at .It works just like ur house hvac unit u need an return and supply