Make sure you properly and CAREFULLY clean your condenser to maintain temperature and reduce mechanical failures.
If you own the model 590 refrigerator, clean your ice shoot out twice a year.
Keep your grill clean to avoid loss of performance. Be sure to remove the grill from the appliance before attempting to clean.
Be sure to turn off your ice-maker if you will be on vacation or away from home for an extended period of time.
Have a qualified and licensed, SubZero™ repair technician come out and do a full preventative care service. They will check all the fluid levels, clean and make sure your unit is running just like it did when it left the factory.