how can i get my ac to regulate temperature and shut off as suppost to. on 2004 Chrysler Pacifica

i changed the blower regulator out for the air conditioner and now the ac blowers work but only on high i can ajust the temp control but it stays on high and will not shut off even when turning the ac off. what can i do to get to fix this problem?

Asked by for the 2004 Chrysler Pacifica