So, i just finished installing my heater core today. Of course, there has to be another issue. Well, basicly, my defroster and bi-level worked just fine before i replaced the core, and now only max-ac and vent work. When i put it on defog or bi-level, it keeps blowing out the front vents. Anyone ever have this problem before? I need help ASAP!

 

make sure all the lines are hooked up and the vacume lines are tight ,relax abit and come back to it when you got a clear mind i just messed some of my stuff up cuz iwas in a rush and now gotta order new parts

 

Well the thing is, i didin't remove any vacuum lines. I checked the doors before i put the cover back on, it seems like the doors won't close all the way or something. I'm really frustrated at this point.

 

go watch a movie or take a nap and come back to it in abit when your mind is clear then check over other ****