Dairy in Meaty Oven

The Aish Rabbi Replies

I’m sorry for the mix-up. You may kasher the oven by waiting 24 hours, cleaning it well with a caustic cleaner, and then heating it for an hour on its highest temperature. If the oven has a self-cleaning cycle (~900° F), then you could just wipe it out of food spills and then run its cleaning cycle. (You wouldn’t have to wait 24 hours first.)

(Source: “The Laws of Kashrus” by R’ B. Forst, pp. 230-31.)