You should go out of your way to look for problems in your kitchen rather than waiting for something to break on you. It is not nearly as difficult or as time intensive as you might think. Look at the food in your home when you are storing it, when you are cooking it, and after you have prepared it. If you are noticing a trend of spoiled or warm food coming from your Sub-Zero freezer or refrigerator then it is time to look into repairing or maintaining your food storage appliances. Some problems can be fixed as easily as turning your temperature dial in your refrigerator, while others may require you to avail the services of Sub-Zero and Wolf Appliance repair to have the job professionally done.