If the light bulb in the oven goes out or stops working, you will need to replace it so you can continue to check how the food is cooking in the oven. If you open the oven door every time you want to check food, heat will escape and the oven will be less efficient.
If you want to keep your oven working efficiently for as long as possible, it's important to remember that maintaining your oven isn't just about changing bulbs when necessary. You should also make sure to keep your oven clean. A dirty oven can reduce efficiency, start giving off bad smells and spoil the taste of your food.
On average, oven bulbs are designed to last about 900 hours. So typically if you use your oven light for 8 hours a day, it will take about 4 months for your bulbs to start fading and stop working. However, most households only use the lights for cooking, so oven bulbs should last about a year on average. If you're having problems with your oven bulbs not lasting a long time, there may be a problem with the connection.
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