Broken Windshield

[CTScott]

Originally Posted by Eatoman

Thanks for the feedback CTScott! I just checked the windshield and there are no chips or scratches to be found anywhere...just this huge crack. I'm starting to wonder if the heat from the vents hitting the cold glass could have caused it to crack. I'm really at a loss. Looking at the placement of the crack, it is directly on top of the dashboard vents that heat the windshield...exact same length as well. Really weird!

Laminated automotive glass is designed to handle extremes in temperature and fast temperature transitions. There has to be some type of flaw or damage for it to crack from thermal expansion. If there is no visible chip or scratch (although a scratch would be almost impossible to identify once it becomes a crack), then it very possible that there was a flaw in the glass that eventually failed.