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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC Systems - Manual >> Trouble Shooting >> Symptom Diagnosis >> Visual/Physical Inspection

Visual/Physical Inspection

NOTE: Perform PRELIMINARY INSPECTION  prior to diagnosing by symptom.
NOTE: Use the following symptoms to aid in preliminary diagnosis. If a listed symptom matches the customer's concern, check the applicable items for possible cause.

Inspect for aftermarket devices which could affect the operation of the HVAC System. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. Check for proper coolant level and condition. The following conditions may cause window fogging:

See appropriate test under SYMPTOM TESTS .