Possible Causes
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
- A short to voltage in circuit 73 (OG/LB), 348 (RD/VT) or 321 (GY/WH)
- PCM
- A/C control relay
- Function selector switch
- Electronic automatic temperature control (EATC) module
- A/C clutch air gap