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SYMPTOMS - HVAC SYSTEMS - MANUAL Visual/Physical Inspection 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 Verify the A/C compressor clutch turns freely and is not seized. The A/C compressor will not operate in cold outside air temperatures. Refer to Air The following conditions may cause window fogging: Wet carpet or mats High humidity Interior water leak Blocked A/C evaporator drain tube Maximum passenger capacity Blocked body pressure relief valves Inspect the air distribution system for causes of reduced air flow: Obstructed or dirty passenger compartment air filter, if equipped Blocked or damaged air inlet or outlet vents Intermittent Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Symptom List Refer to a symptom diagnostic procedure from the following list in order to diagnose the IMPORTANT: Review the system operation in order to familiarize yourself with the system functions. Refer to the following: Air Delivery Description and Operation Air Temperature Description and Operation
2007 Hummer H3 2007 HVAC HVAC - Manual - H3
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