Kosher Appliances

Question

We went to a frum appliance store the other day and, in the course of conversation,we were informed in that certain refrigerators and stoves had certification from some kashruth agencies for Shabbos operation. The salesperson was unclear about just what new operation/s of the refrigerator required certifcation. I got the following from the Star K website: "Sabbath Mode Fridge Presently the Star-K is working with some manufacturers to incorporate modifications that will alleviate some of the Shabbos and Yom Tov concerns. Specifically: 1) to install a Sabbath mode to modify any adaptive defrost feature so that it would not react directly to opening the door or revert to a timed system when in Sabbath mode, 2) to bypass any electronic readouts, fan operation, icons or lighting that would otherwise be tied to opening the door of the refrigerator, and 3) to install a random delay feature to such Sabbath mode refrigerators to prevent the compressor from reacting directly to the opening of the refrigerator door. Rather, the temperature reading will be done at random intervals signaling the compressor into action. This would incorporate a grama with regard to the thermostat signal to start the compressor. In the meantime, we would suggest testing the refrigerator at the store before purchasing, to be sure that there are no Shabbos and Yom Tov concerns. The first of these Sabbath mode refrigerators to hit the market has been a wine cooler, followed by side-by-side and bottom mount refrigerators, all manufactured by Viking Range Corporation. We hope that more models which address the refrigeration needs of the Torah observant consumer will be available in the near future." The issues of the bulb, compressor and anti-frost fan have been dealt with years ago by the major poskim. The icemaker can easily be disabled by placing the bar in the up and locked position provided. The changing LED temperature read-out L'fi anias da'ati, does not appear to be much of a problem. The change in display seems to be caused by grama in that the act of opening the door does not, in itself, cause the change but affects the temperature in the refrigerator which, in turn, may change the read-out. I also seems to be lo niecha lei. Finally, the specific issur in iluminating an LED is unclear and would be at worst, it seems to me, a d'rabbanan, resulting in shvus d'shvus. I'm to sure of what the other issues may be. Do you have any additional info or comments on the above? Regards and Haagen Daaz Unk