Why do oven doors shatter and how to prevent it? – Truth here!

As I sat down to eat dinner, the glass door of my oven suddenly shattered into pieces. It happened a few minutes after I had turned it off, and it scared me to the core. This oven is relatively new, only 2-3 years old. I wonder why this happened and what I can do to stop it from happening again. Buying a new oven is out of the question for me right now. What steps should I take next?

Willie Mae Truesdale was taken aback by a sudden loud noise echoing from the kitchen. Without hesitation, she rushed to investigate and found the glass door of her oven completely shattered. Despite the oven being turned off, the glass had inexplicably exploded into countless fragments. “It was truly unbelievable,” she recounted. “I couldn’t wrap my head around it. Glass everywhere, scattered across the floor.”

Truesdale’s situation is not an isolated incident. Several other women have encountered similar problems. For instance, Cheryl, a mother from the suburbs, discovered that the oven she bought three months ago was not heating accurately while baking muffins – it was off by 25 degrees. This occurred during the pandemic, and after the lockdown was lifted, she called a technician to repair the oven. Prior to that, she attempted a self-cleaning cycle, which resulted in a loud explosion and the inner glass of the oven door shattering.

Michelle Wheat also experienced an oven door explosion, mirroring Truesdale’s incident. Like Truesdale, Wheat’s oven was not in use when it happened.

Shards of glass covered the kitchen floor, but thankfully, none of her four kids were hurt. The Consumer Product Safety Commission has documented around 450 similar cases since 2019. The faulty ovens came from various manufacturers.


The three women faced challenges with the companies following the incidents. Truesdale’s oven was covered by warranty, yet a Frigidaire technician accused her of causing the explosion and made her pay for a new door. NBC’s involvement prompted Bosch to replace Cheryl’s oven. Wheat, whose oven was no longer under warranty, had to shell out $100 for a technician to confirm the broken glass, and then another $314 for the replacement.

Wheat expressed her frustration, stating, “This was not supposed to happen. I was trying to make that clear to them.”

Mark Meshulam from Chicago Window Expert explains why oven glass can break spontaneously. He mentions that there are two possible reasons for this. The first reason is that some oven glass is made of soda lime glass, which is heated and cooled rapidly to become tempered. The second type of glass is borosilicate glass, which is more resistant to heat and cold. According to Meshulam, the increase in breaks is due to the shift to soda lime glass, which is not as tolerant of the thermal cycles that the glass goes through.


One alternative explanation is that the explosions are the result of a nickel sulfide inclusion, a small defect in the glass. “It’s only around one-tenth of a millimeter in size. That tiny ball has some unusual characteristics,” Meshulam explained, “over time, it’s trying to escape. And occasionally, a high-temperature event such as oven cleaning can trigger the spontaneous failure that was already present.”

He provides assurance to individuals regarding the safety of ovens’ self-cleaning feature. According to him, most individuals can use this feature throughout their lives without facing any issues. He believes that small chips and imperfections are responsible for oven explosions when not in use. The fact that the door can break long after the initial damage is particularly worrisome.

The homeowners have no control over these instances of damage, as they typically occur during production, shipping, or installation.

Using aggressive cleaning methods and applying excessive physical force can also cause microscopic scratches or chips on the glass.

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