Heating and cooling units are a big investment, so it’s understandable that you’d want them to last as long as possible. Reducing usage is always helpful, so turn the thermostat up or down, as needed, to reduce use when you’re not at home. Changing air filters will prevent clogs.
It is also important to perform routine maintenance as well. This can help to prevent those pesky problems from occurring in the first place while extending the life of your furnace to save you money in the long run.