If the glass has only a small crack in it, I wouldn't be too concerned. If the glass is ready to fall out if you close the door hard, then worry. Many times the glass gets spider cracks, not all the way through. This you can keep an eye on, but if the crack can cause the glass to dislodge from the door, then it's time to repair it. We made 2 different style doors for that unit. I would need to know which door the stove has on it. So if your going to replace it, it would be best to call me at work. 570.572.1811.