Many modern double pane windows carry . If the crack is from thermal stress (not impact from a baseball or accident), the manufacturer may send you a new IGU for free. You’d still pay labor (around $150–$250).

Small, shallow chips or cracks that haven't fully penetrated the pane might be manageable with a glass repair kit .

If your glass is cracked but the frame is in good shape, is the way to go. It’s a "5-star" move for your wallet and energy bill, even if the "3-star" wait for custom glass is a bit annoying.