The decision has been made, it's time to sell the house. Everything looks good, the market is steady, plenty of buyers interest and then the INSPECTOR comes back with some unexpected report. Glass needs to be replaced, a window is leaking water and air or worse of all, the whole window needs to be replaced...
One may ask why such a minor thing will cause the delay of the sale.
Some issues may be flagged in a written inspection report such as broken or missing panes. The main issue here is that a cracked window glass lets air and heat into the property hence it will cause waste of energy. Just imagine having an AC unit working 24 hours a day without a break because the house can never get to the desired temperature. The 2 problems seem unrelated but your window can cause that, a few years later, you still need to deal with replacing the window but also your AC unit.
A Cracked glass, as thin as a hair will eventually brake the panel due to closing and occasionally slamming the window whether by you cause the kid has missed his or her soccer practice or due to the high-speed wind... Shattered glass can cause all kinds of hazards from cuts to extreme injuries.
If any issue in regard to windows is mentioned in the inspection report, take it seriously. Follow the recommendation outlined and involve having a window specialist evaluate the items and make appropriate suggestions for repairs or other solutions unless it is an easy DIY kind of fix.