If your American Standard Freedom 80 furnace is displaying a flashing red light twice, it could indicate that the heater has detected an issue with the high limit switch. The high limit switch is responsible for monitoring and controlling the temperature in your furnace, so if this component fails or malfunctions, then it can cause issues with your system. If you are seeing two flashes from the red light on your American Standard Freedom 80 furnace, you should immediately shut off power to the unit and contact a licensed HVAC technician for further assistance.