Does the extractor hood have to be kashered? May it be used on Pesach?
The extractor hood should be cleaned well before pesach so that there isn’t any grease etc. on it, but it does not have to be kashered. This is because the steam that rises to the hood is not hot and no absorbed chometz taste gets into it. You should be careful not to put pots too close to it on pesach. You technically don’t have to cover it, but it is preferred that it be covered with foil for pesach.