Baking Parve Food in a Fleishige Oven

21. Although ovens should not be regularly kashered back and forth, if one wants to bake something parve, e.g., challoh for Shabbos or Yom Tov, in a fleishige or milchige oven, he may kasher it lechatchiloh.

22. Cleaning the oven. Before baking something parve, such as challos, in a fleishige or milchige oven, one must make sure it is totally free of food substances. This can be done by wiping it down; it is not necessary to use a cleansing agent.

23. Waiting 24 hours or kashering. There is no need to wait 24 hours and to kasher the oven. Since it is only for parve, one may either wait 24 hours so that it is not a ben yomo without kashering it, or run it on its highest temperature for 40 minutes without waiting 24 hours.