I have one electronic thermometer in there and I have had 2 before. If I take the egg turner out it stays at the temp I set it to. I just thought if I went to an electronic temp controller it would turn power off to the incubator but the egg turn would still be plugged in giving off heat, so until it cooled down, it would be supplying the heat instead of the incubator. Then controller would take care of the rest. I guess the 2 degree difference can not hurt that much if it is just for a short period of time.