so the vehicle is a 98 , I have the fancy dual driver ,passenger air/heater control system in it , the control works for dischargeing air in the proper directions as in floor, vents ,dash so that is not the issue. I have installed a new control in the dash and this did not fix my issue. the issue is the passenger side works normal for hot air coming from the vents but I cannot get any hot air from the drivers side vents at all. I have disconnected the battery to drain all power from electronics and sometimes I get hot air for a moment and then back to blowing only cold . so where to look next or try as I can see in sask. we will be needing a heater in the car this spring lol