Insufficient Heat
WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
Ensure cooling system is operating properly. Check heater system hoses and core for coolant flow. Check for loose or misaligned cable to temperature blend door.