2007 Ford Explorer Sport Trac Q&A
2007 Ford Explorer Sport Trac Question: How do I troubleshoot heater blowing cold air regardless of temp dial setting?
If you had a scan tool to check hvac data it would be easier; If you open the glove box and can see the top of the heater case, look toward the center top of case. There is a square looking plastic piece screwed to the top with a small right angle arm holding a metal rod. That arm should turn the rod as you change the temp dial from Heat - Cold. If not moving the actuator is best reason for your problem. - ProfessorG