Possible causes
WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- A short to voltage in circuits 321 (GY/WH), 348 (VT), 441 (RD/YE) or 439 (TN/RD)
- A short to ground in circuit 331 (PK/YE)
- PCM
- Electronic automatic temperature control (EATC) module
- A/C control relay
- A/C clutch air gap