When your heating system is in tip-top shape and less than eight-years-old, having it serviced once a year should keep it operating well and maintain its energy efficiency. When the system ages and begins to show signs of aging, you may need to have it serviced twice a year, making sure that one visit is right before the heating season in your area. Your HVAC technician will also perform troubleshooting on your system to check for any potential issues.
Having your furnace regularly serviced is critical, and it will improve safety, keep your energy bills down, and prevent your warranty from being voided. You should check and change your air filters monthly or according to the manufacturer guide in between service visits. This will help you maintain proper indoor air quality.