My Pacifica 2007 AC and heater will not blow air. Cold air seeping through... on 2007 Chrysler Pacifica

It has done this on and off for about a year. I had it looked at once but they couldn't get it to turn off - so no problem could be found. Now it is totally off - wont come back on. Use to kick back on after a few starts or driving faster on hwy. Air seeping through the vents is cold - but blower will not come on. Ideas? Can my husband repair?

Asked by for the 2007 Chrysler Pacifica