Symptom Starting Point

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

^ HVAC Blower Controls Circuit Description
^ HVAC Blower Controls Circuit Description - Auxiliary
^ HVAC Compressor Controls Circuit Description
^ HVAC Air Delivery/Temperature Control Circuit Description

VISUAL/PHYSICAL INSPECTION
^ Inspect for aftermarket devices which could affect the operation of the HVAC System. Refer to Checking Aftermarket Accessories in Diagrams.
^ 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.

SYMPTOM LIST
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ HVAC Compressor Clutch Does Not Engage
^ HVAC Compressor Clutch Does Not Disengage
^ Blower Motor Inoperative at Any Speed
^ Blower Motor Low Speed Inoperative
^ Blower Motor Inoperative Med-1
^ Blower Motor Inoperative Med-2
^ Blower Motor Operates at High Speed Only
^ Blower Motor High Speed Inoperative
^ Blower Motor Always On
^ Blower Motor Inoperative at Any Speed - Auxiliary
^ Blower Motor Inoperative at Any Speed - Auxiliary A/C (Cargo Van) or Blower Motor Inoperative at Any Speed - Auxiliary A/C (Passenger Van)
^ Blower Motor Low Speed Inoperative - Auxiliary
^ Blower Motor Low Speed Inoperative - Auxiliary A/C
^ Blower Motor Medium Speed Inoperative - Auxiliary
^ Blower Motor Medium Speed Inoperative - Auxiliary A/C
^ Blower Motor High Speed Inoperative - Auxiliary
^ Blower Motor High Speed Inoperative - Auxiliary A/C
^ Blower Motor Always On - Auxiliary
^ Blower Motor Always On - Auxiliary A/C (Cargo Van) or Blower Motor Always On - Auxiliary A/C (Passenger Van)
^ Blower Motor Operates at High Speed Only - Auxiliary
^ Temperature Actuator Inoperative
^ Temperature and Mode Valves Inoperative-Auxiliary
^ Temperature Valve Assembly Inoperative - Auxiliary
^ Mode Valve Only Inoperative - Auxiliary