Law of Hot Plates - Gruffa and Ketuma
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Question
In modern hot plates, most of which work with a thermostat, turning the knob up does not increase the fire but makes it work longer, and similarly, turning the knob down makes the fire go out faster. Do these plates need to be covered due to concerns of Gruffa and Ketuma, or do they not need to be covered at all, and are considered Gruffa and Ketuma, since there is no concern in Halacha of lighting a new fire, only that if there is already a fire, it will be increased? However, these plates cannot increase the fire, and the only concern is that the fire will be reignited when it is not working, as this plate works for a few minutes and then does not work for a few minutes. Should this be a concern? If possible, please present this question to our teacher, the great Gaon, Rabbi Amram Fried, shlita, as in my opinion, this requires an answer from a great one in Israel.
Answer
Hello,
According to the instructions of the Gaon, Rabbi Amram Fried, shlita, there is no need for the plate to be Gruffa and Ketuma.
Source
Shulchan Aruch, Orach Chaim, Siman 253