Symptoms - Heating, Ventilation, and Air Conditioning. Holden WM Sedan 2009

For 1990-2009 cars only

Makes 🢒 Holden 🢒 2009 🢒 WM Sedan 🢒 Body Systems 🢒 Fixed and Moveable Windows 🢒 Symptoms - Heating, Ventilation, and Air Conditioning

Important: Review the system operation in order to familiarise yourself with the system functions. Refer to:

•	Air Delivery Description and Operation Manual or Air Delivery Description and Operation Automatic.

•	Air Temperature Description and Operation Manual or Air Temperature Description and Operation Automatic.

•	Inspect for aftermarket devices which may affect the operation of the HVAC System. Refer to Checking Aftermarket Accessories.

•	Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

•	Verify the A/C compressor turns freely and is not seized.

•	The A/C compressor will not operate in cold outside air temperatures. Refer to Air Temperature Description and Operation.

•	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:

Blocked or damaged air inlet or outlet vents

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	Blower Motor Malfunction.

•	Leak Testing.

•	Defrosting Insufficient.

•	Noise Diagnosis - Blower Motor.

•	Noise Diagnosis - Air Conditioning (A/C) System.

•	Noise Diagnosis - HVAC Module.

•	Odor Diagnosis.