HVAC System-General Information And Diagnosis

• Specifications
  • General Specifications
  • Torque Specifications
• Description And Operation
  • Climate Control System
    • Climate Control System
    • Principles of Operation
      • Notes
      • Heat Transfer
      • Latent Heat of Vaporization
      • Relative Humidity
      • Effects of Pressure on Boiling or Condensation
      • Compressor Anti-Slugging Strategy
      • The Refrigerant Cycle
    • System Airflow Description
      • Panel
      • Panel/Floor
      • Floor
      • Floor/Defrost
      • Defrost
• Diagnosis And Testing
  • Climate Control System
    • Notes
    • Special Tool(s)
    • Inspection and Verification
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test A: The Blower Motor Is Inoperative
        • Normal Operation
        • Possible causes
        • Pinpoint Test A: The Blower Motor Is Inoperative
      • Pinpoint Test B: The Blower Motor Does Not Operate Correctly
        • Normal Operation
        • Possible causes
        • Pinpoint Test B: The Blower Motor Does Not Operate Correctly
      • Pinpoint Test C: The Air Conditioning (A/C) Is Inoperative/Does Not Operate Correctly
        • Normal Operation
        • Possible causes
        • Pinpoint Test C: The Air Conditioning (A/C) Is Inoperative/Does Not Operate Correctly
      • Pinpoint Test D: The Air Conditioning (A/C) Is Inoperative - Defrost And Floor/Defrost Modes Only
        • Normal Operation
        • Possible causes.
        • Pinpoint Test D: The Air Conditioning (A/C) Is Inoperative - Defrost And Floor/Defrost Modes Only
      • Pinpoint Test E: The Air Conditioning (A/C) Is Always On
        • Normal Operation
        • Possible causes
        • Pinpoint Test E: The Air Conditioning (A/C) Is Always On
      • Pinpoint Test F: The Air Inlet Door Is Inoperative
        • Normal Operation
        • Possible Causes
        • Pinpoint Test F: The Air Inlet Door Is Inoperative
      • Pinpoint Test G: Air Conditioning (A/C) and Recirc Modes Are Inoperative
        • Normal Operation
        • Possible causes
        • Pinpoint Test G: Air Conditioning (A/C) And RECIRC Modes Are Inoperative
      • Pinpoint Test H: Temperature Control/Function Selector Is Inoperative
        • Normal Operation
        • Possible causes
        • Pinpoint Test H: Temperature Control/Function Selector Is Inoperative
    • Component Tests
      • Resistor - Blower Motor
      • Switch - Blower Motor
      • Heater Core
      • Heater Core - Plugged
      • Heater Core - Pressure Test
      • Heater Core - Bench Test
      • A/C Evaporator/Condenser Core - On-Vehicle Leak Test
      • A/C Compressor - External Leak Test
• General Procedures
  • Spring Lock Coupling
    • Special Tool(s)
    • Materials
    • Disconnect
    • Cleaning
    • Connect
  • Air Conditioning Line (Peanut) Fitting
    • Disconnect
    • Connect
  • Refrigerant System Tests
    • Special Tool(s)
    • Procedure 1 - Ambient Temperature at or Below 38°C (100°F)
    • Procedure 2 - Ambient Temperature Above 38°C (100°F)
    • Diagnostic Table
  • Air Conditioning (A/C) Clutch Air Gap Adjustment
  • Manifold Gauge Set Connection
  • Electronic Leak Detection
  • Fluorescent Dye Leak Detection
    • Special Tool(s)
    • Fluorescent Dye Detection
    • Fluorescent Dye Injection - Using an A/C Refrigerant Center and Dye Injector
    • Fluorescent Dye Injection - Using a Dye Injector Loop Kit
  • Air Conditioning (A/C) System Flushing
  • Air Conditioning (A/C) System Recovery, Evacuation and Charging
    • Special Tool(s)
    • Materials
    • Refrigerant System Recovery
    • Refrigerant System Evacuation Using an R-134a Service Center
    • Refrigerant System Evacuation Using an R-134a Manifold Gauge Set
    • Refrigerant System Charging Using an R-134a Service Center
    • Refrigerant System Charging
  • Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
  • Refrigerant Oil Adding
    • Special Tool(s)
    • Materials
    • Refrigerant Oil Adding
    • Refrigerant Oil Adding for New A/C Compressor Installation
    • Refrigerant Oil Adding for New Suction Accumulator or Receiver/Drier Installation
    • Oil Injection Using a Dye/Lubricant Injector
  • Refrigerant Identification Testing
    • Special Tool(s)
    • Refrigerant Identification
    • Contaminated Refrigerant Handling
  • Air Conditioning (A/C) Odor Treatment
    • Special Tool(s)
    • Materials
    • A/C Odor Treatment