heat or ac does not blow out like it should

i have a 1992 chevy s 10 blazer with a 4.3 cpi v6. my heater has hot air and my ac has cold air but it doesnt blow out like it should. i will have it on high and i can barely feel anything coming out. i know that it isnt my blower motor because i have bought a new one. now i cant seem to figure it out. please help someone!!!!

probly your resistor card or ac control head