The freezer should be between 0 and 5 degrees F. Manual defrost refrigerators are generally more efficient than automatic defrost models, but only if they are properly maintained. Vacuum the coils in the back of your refrigerator twice a year to maximize efficiency. Check the door gasket occasionally to be sure the seal isn't broken by debris or caked on food. Refrigerator should not be located near the stove, dishwasher, heat vents or exposed to direct sunlight. Never run frost-free refrigerators with freezer compartments in unheated areas with air temperature below 60 degrees F. Stove Use the burner which is the closest match to pot size.
Heat is lost and energy is wasted if burner size is larger than pot size.
Use lids on pots and pans so you can cook at lower settings. Keep drip pans under conventional coil burners clean. Don't line drip pans with aluminum foil - they can reflect too much heat and damage the elements. Only preheat when baking. Check your oven temperature.