Tempered glass is often used for oven doors. In this case, it is used for a combination microwave, convection oven. The oven door is 2 layers of tempered glass with a 2” separation. The “door return spring” is between these two panels. Unfortunately, there isn’t sufficient clearance for the spring coil to move during operation; this results in the spring rubbing on the outer glass pane. As a result, the rubbing damage would go deep enough for the tempered glass to shatter (i.e. self-destruct).
