Kashering an Oven - From Chametz to Passover
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Question
Hello, We have a meat oven that we used for chametz and haven't used it for the last 5 years because we bought a new one 5 years ago. Can we use the old oven for Passover? Happy holiday!
Answer
Hello
I am quoting from the rulings of our teacher, the Gaon, Rabbi Avraham Fried, shlita:
Some are lenient and allow kashering an oven for Passover by waiting 24 hours from the last baking, heating it at the highest temperature for an hour, and using different trays [and if possible, it is better to heat food in it when covered].
However, many are stringent and believe that a regular oven cannot be kashered for several reasons: [A] To kasher it, a severe libun of close to 500 degrees is required, and a regular oven reaches at most 300-250 degrees. [B] The oven has a glass door, which according to the Rema, cannot be kashered. [C] The oven's gaskets are considered like plastic, for which hagalah and light libun are not effective. [D] The walls of the baking chambers are made of enamel, which is stringently not kashered for Passover (see Shaarei Tzion, siman 452, se'if katan 191).
Source
Azmera Leshimcha 282