Yes, it would help if the furnace and the air conditioner were inspected and serviced at least once a year. You can save money and keep yourself and your family comfortable every season if you maintain the HVAC system regularly.
A lack of regular and thorough maintenance is the primary cause of furnace problems. A badly maintained furnace can suddenly stop working in the middle of winter, causing considerable discomfort. It's also more likely that carbon monoxide will be present in the indoor air if the furnace isn't serviced once a year.