Symptom Table

IMPORTANT: Review the system operation in order to familiarize yourself with the system functions.

^ If equipped with the C60 system, refer to Control Assembly Description (C60) or Control Assembly Description (C34). Control Assembly Description (C60) Control Assembly Description (C34)
^ If equipped with the C34 system, refer to

VISUAL/PHYSICAL INSPECTION
^ Inspect for aftermarket devices which could affect the operation of the HVAC System. Refer to Checking Aftermarket Accessories in Diagrams. Checking Aftermarket Accessories
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

INTERMITTENT
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams. Diagnostic Aids

SYMPTOM LIST
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Blower Motor Inoperative at Any Speed (Front) or Blower Motor Inoperative at Any Speed (Rear). Front Rear
^ Blower Motor Operates at High Speed Only (Front). Blower Motor Operates At High Speed Only - Front
^ Blower Motor Inoperative in One Speed Only (Front, High Speed Operates Normally) or Blower Motor Inoperative in One Speed Only (Rear, High Speed Operates Normally). Frt, Hi Speed Operates Normally Rear, Hi Speed Operates Normally
^ Blower Motor High Speed Inoperative (Front). Blower Motor High Speed Inoperative - Front
^ Blower Motor Always On (Front) or Blower Motor Always On (Rear, With Ignition In RUN). Blower Motor Always On - Front Blower Motor Always On - Rear (With Ignition In Run)
^ Air Delivery Improper. Air Delivery Improper
^ Temperature Control Inoperative (No Airflow for Warm/Cold) or Temperature Control Inoperative (Front and Rear). No Airflow For Warm/Cold Front and Rear
^ Defrosting Insufficient. Defrosting Insufficient
^ Defrost Air Inoperative. Defrost Air Inoperative
^ Air Recirculation Inoperative. Air Recirculation Inoperative
^ Cooling Insufficient, A/C System. Testing and Inspection
^ HVAC Compressor Clutch Does Not Engage. Compressor Clutch Does Not Engage
^ HVAC Compressor Clutch Does Not Disengage. Compressor Clutch Does Not Disengage
^ Heating Insufficient. Heating Insufficient
^ Cold Drafts on Floor. Cold Drafts on Floor
^ Noise Diagnosis - A/C System. Noise Diagnosis - A/C System
^ Odor Diagnosis. Component Tests and General Diagnostics

For a description of the RPO Code(s) shown in this article/image, refer to the RPO Code List found at Vehicle/Application ID RPO Codes