Why Do Oven Doors Break, and How Can You Prevent It?
A Sudden Explosion in the Kitchen
Imagine hearing a loud blast from your kitchen, only to find that your glass oven door has shattered into pieces. That’s exactly what happened to Willie Mae Truesdale, who was left shocked when she discovered her oven door broken, even though the appliance wasn’t even in use at the time.
“It was unbelievable—you had to see it to believe it.”
Truesdale isn’t alone. Oven glass doors spontaneously shattering is a growing concern, with numerous cases reported. Cheryl, a mother from the suburbs, also experienced a similar situation during the COVID-19 lockdown. After noticing her brownies weren’t baking evenly, she planned to get her oven repaired but decided to run the self-cleaning cycle first. Just as the cycle was nearing completion, she heard a loud explosion—her oven’s inner glass door had shattered, sending shards of glass inside the oven.
Her appliance, like Truesdale’s, was from well-known brands like Bosch and Frigidaire, but complaints have surfaced across multiple brands. In fact, since 2019, the Consumer Product Safety Commission (CPSC) has received over 450 reports of exploding oven doors.
Why Do Oven Doors Shatter?
Mark Meshulam, a glass expert from Chicago Window Expert, explains that there are two main reasons why oven glass doors can spontaneously break:
1. The Type of Glass Used in Ovens
Most modern ovens use soda-lime glass, which is similar to window glass. This type of glass is tempered through a process of rapid heating and cooling, making it stronger but also prone to sudden failure under extreme conditions. In contrast, older Pyrex products and lab equipment often use borosilicate glass, which handles temperature fluctuations much better.
Because soda-lime glass is now the standard in ovens, shattering incidents have increased, as it doesn’t tolerate thermal changes as well as borosilicate glass.
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