Symptom Chart: NVH
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to SERVICE INFORMATION for information regarding Ford-specific diagnostic practices.
Symptom Chart: NVH
| Condition | Possible Sources | Actions |
|---|---|---|
| Noisy A/C compressor | A/C compressor pulley bearing worn | INSPECT the A/C compressor pulley bearing for roughness. If bearing roughness is found, INSTALL a new A/C compressor pulley. Refer to CLUTCH AND CLUTCH FIELD COIL - 3.5L Ti-VCT , or for all other engines, Refer to CLUTCH AND CLUTCH FIELD COIL . |
| Excessive hissing from the front plenum when the A/C is on | Low refrigerant charge | INSPECT the A/C system for a refrigerant leak; Refer to Electronic Leak Detection or Fluorescent Dye Leak Detection . CHECK the A/C refrigerant level. Refer to Refrigerant System Tests . |