Sabbath mode

A range of solutions has been created for those who need to use electronic (or electronic-controlled) devices on the Shabbat,[4][5][6] including a special "Sabbath mode" for otherwise standard appliances.

[7] In the past, the Sabbath-observant would leave their food heating on the stove where it had been covered with a blech (metal sheet), or in the oven in which it had been cooked before the onset of Sabbath.

[10] However, several manufacturers have not dealt with the issues caused by the heating elements and the thermostats, which in some Sabbath modes continue to operate as normal, which is in contradiction to normative halachic opinion.

[13] According to the prevailing Orthodox opinion and the minority Conservative view, this is not relevant to the Shabbat, but is useful on some holidays, when adjusting the heat is allowed, but changing a digital readout on the control panel is not.

[13] In June 2008, nine Haredi poskim signed a public pronouncement (Kol Kore) stating that it was forbidden to raise or lower the temperature by reprogramming on Yom Tov using the Star-K Kosher Certification approved Shabbat Mode feature.