Possible Causes
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- An open or short to ground in circuit 1069 (OG/LB).
- ATC solenoid and manifold.
- DATC module.
- Manual climate control assembly.
- Heater control valve.
- Stuck or bound linkage or door.
- Leaking or plugged vacuum hose.