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Symptom Chart: Noise, Vibration, and Harshness (NVH)

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

NOTE: Some PCM Diagnostic Trouble Codes (DTCs) may inhibit A/C operation. If any PCM Diagnostic Trouble Codes (DTCs) are retrieved, diagnose those first. Refer to DTC Chart: Powertrain Control Module (PCM) .
Condition Possible Sources Actions
Noisy A/C compressor A/C compressor bearing worn INSPECT the A/C compressor bearing for roughness. If bearing roughness is found, INSTALL a new A/C Compressor. REFER to the appropriate GENERAL PROCEDURES .
Excessive hissing from the plenum when the A/C is on Incorrect A/C refrigerant level CHECK the A/C refrigerant level. CARRY OUT the refrigerant system tests. REFER to the appropriate Refrigerant System Tests in GENERAL PROCEDURES .
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