90 Quattro 20V L5-2309cc 2.3L DOHC (7A) (1990): Heating and Air Conditioning

Also for this vehicle: 90 L5-2309cc 2.3L SOHC (NG) (1988), 90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989), 90 Quattro Sport V6-2.8L (AFC) (1995), 90CS Quattro V6-2.8L (AAH) (1994), 90CS Quattro V6-2.8L (AFC) (1995), 90S Quattro (Canada) V6-2.8L (AAH) (1993), 90S Quattro (Canada) V6-2.8L (AFC) (1995), 90S, CS V6-2.8L (AAH) (1994), 90S, CS V6-2.8L (AFC) (1995).

Diagnostics Maintenance Engine Transmission Brakes Electrical Steering & suspension Heating & A/C Body & interior

Choose Sections to see everything in a chapter, or a chapter title to start at its first page.

01Relays and Modules Relays and Modules: Sections
02Sensors and Switches Sensors and Switches: Sections
03Maintenance Maintenance: Sections
04Engine, Cooling and Exhaust Engine, Cooling and Exhaust: Sections
05Powertrain Management Powertrain Management: Sections
06Transmission and Drivetrain Transmission and Drivetrain: Sections
07Brakes and Traction Control Brakes and Traction Control: Sections
08Starting and Charging Starting and Charging: Sections
09Power and Ground Distribution Power and Ground Distribution: Sections
10Steering and Suspension Steering and Suspension: Sections
11Heating and Air Conditioning Heating and Air Conditioning: Sections
- Accumulator HVAC › Component Information › Specifications2
- Air Door, HVAC14 pages
  - Air Door Actuator / Motor, HVAC › Component Information12 pages
    Testing and Inspection › Fresh/Recirculating Air Flap Servo Motor, Testing2 3 4 5 6 7
    Adjustments › Vacuum Unit Arm Length2
    Service and Repair › Footwell/Defroster › Driver Side Mounted2 3
  - Air Door Cable, HVAC › Component Information › Service and Repair2
- Air Duct › Component Information › Service and Repair › Instrument Panel2 3
- Ambient Temperature Sensor / Switch HVAC › Component Information › Specifications2 3 4 5 6 7
- Blower Motor › Blower Motor Impeller › Component Information › Testing and Inspection
- Blower Motor Resistor › Component Information16 pages
  - Technical Service Bulletins › Fresh Air Blower - Operates in 4th Stage Only
  - Diagrams15 pages
    Diagram Information and Instructions › General Information › Circuit Sections2 3
    Diagnostic Aids › Basic Electricity2 3 4 5 6 7 8 9 10 11 12
- Cabin Temperature Sensor / Switch › Component Information6 pages
- Compressor HVAC › Compressor Clutch › Component Information16 pages
  - Specifications
  - Diagrams15 pages
    Diagram Information and Instructions › General Information › Circuit Sections2 3
    Diagnostic Aids › Basic Electricity2 3 4 5 6 7 8 9 10 11 12
- Compressor Clutch Diode HVAC › Component Information › Locations2 3
- Condenser HVAC › Component Information › Service and Repair
- Condenser Fan › Component Information › Diagrams15 pages
  - Diagram Information and Instructions › General Information › Circuit Sections2 3
  - Diagnostic Aids › Basic Electricity2 3 4 5 6 7 8 9 10 11 12
- Control Assembly, HVAC › Component Information › Service and Repair
- Control Module HVAC › Component Information24 pages
- Coolant Temperature Sensor / Switch HVAC › Component Information › Specifications2 3 4
- Coupler HVAC › A/C Coupler O-ring › Component Information › Specifications
- Evaporator Housing <--> [Evaporator Case] › Component Information › Service and Repair2 3 4
- Evaporator Core › Component Information › Service and Repair2 3 4
- Water Drain Valve <--> [Evaporator Drain Tube] › Component Information › Locations2
- Expansion Block/Orifice Tube › Component Information › Locations2 3
- Heater Control Valve › Component Information › Service and Repair
- Heater Core › Component Information › Service and Repair2 3 4 5
- Heater Plenum Chamber <--> [Heater Core Case] › Component Information › Service and Repair2 3
- Housing Assembly HVAC › Component Information › Technical Service Bulletins2 pages
  - Customer Interest for Housing Assembly HVAC: › 879104
  - All Technical Service Bulletins for Housing Assembly HVAC: › 879104
- Refrigerant › Component Information › Specifications › Capacity Specifications2
- Refrigerant Oil › Component Information › Specifications › Capacity Specifications2
- Refrigerant Pressure Sensor / Switch, HVAC18 pages
  - High Pressure Sensor / Switch, HVAC › Component Information11 pages
    Specifications › Mechanical Specifications › A/C Refrigerant High Pressure Safety SW (For Compressor Clutch)2 3
    Locations › A/C High Pressure Switch2 3 4 5 6
    Description and Operation › A/C Refrigerant High Pressure Switch (-F23-)2
  - A/C Low Pressure Switch <--> [Low Pressure Sensor / Switch, HVAC] › Component Information7 pages
    Specifications › Mechanical Specifications2
    Testing and Inspection › Component Test Method2 3 4 5
- Relays and Modules - HVAC › Control Module HVAC › Component Information24 pages
- Sensors and Switches - HVAC41 pages
  - Ambient Temperature Sensor / Switch HVAC › Component Information › Specifications2 3 4 5 6 7
  - Cabin Temperature Sensor / Switch › Component Information6 pages
    Specifications
    Locations › Inside Temperature Sensor 12 3
    Service and Repair › Instrument Panel Mounted › Temperature Sensor2
  - Coolant Temperature Sensor / Switch HVAC › Component Information › Specifications2 3 4
  - Refrigerant Pressure Sensor / Switch, HVAC18 pages
    High Pressure Sensor / Switch, HVAC › Component Information11 pages
    Specifications › Mechanical Specifications › A/C Refrigerant High Pressure Safety SW (For Compressor Clutch)2 3
    Locations › A/C High Pressure Switch2 3 4 5 6
    Description and Operation › A/C Refrigerant High Pressure Switch (-F23-)2
    A/C Low Pressure Switch <--> [Low Pressure Sensor / Switch, HVAC] › Component Information7 pages
    Specifications › Mechanical Specifications2
    Testing and Inspection › Component Test Method2 3 4 5
  - Throttle Full Open Switch HVAC › Component Information › Testing and Inspection › With 3 Speed Automatic Transmission2 3 4 5 6
- Vacuum Harness HVAC › Component Information › Diagrams
- Vacuum Reservoir HVAC › Component Information › Testing and Inspection
- Vacuum Solenoid Valve HVAC › Component Information › Description and Operation2
12Restraint Systems Restraint Systems: Sections
13Accessories and Optional Equipment Accessories and Optional Equipment: Sections
14Body and Frame Body and Frame: Sections
15Cruise Control Cruise Control: Sections
16Instrument Panel, Gauges and Warning Indicators Instrument Panel, Gauges and Warning Indicators: Sections
17Lighting and Horns Lighting and Horns: Sections
18Windows and Glass Windows and Glass: Sections
19Wiper and Washer Systems Wiper and Washer Systems: Sections