Why is your 98 expedition not blowing hot air?

If your 1998 Expedition is not blowing hot air, it could be due to several issues. Common causes include low coolant levels, a malfunctioning thermostat, or a faulty heater core. Additionally, check the HVAC controls for proper operation, as electronic issues can also prevent hot air from circulating. A thorough inspection of these components is recommended to identify the exact problem.