Visual/Physical Inspection
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
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. Verify the A/C compressor clutch turns freely and is not seized. The A/C compressor will not operate in cold outside air temperatures. The following could 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
- Obstructed Or Dirty Passenger Compartment Air Filter (If Equipped)
- Blocked Or Damaged Air Inlet Or Outlet Vents