Help...couple weeks ago i posted that my 2008 is250 was having a/c issues...my a/c works fine for a week then 1 day no air will blow out of the vents, then after about a day it works again for a week then stops for a day....last Saturday it stopped blowing out of the vents so i changed the motor blower and resistor on the blower and it immediately started working again after changing...well a week passed and it’s doing the same thing stopped blowing out of the vents after a week...any other ideas on what it might be? I live in AZ and a/c is definitely essential lol