A/C system components (in passenger compartment): Notes

NOTE:

After completing service work, always check and erase DTC memory, carry out basic setting and check coding of A/C control head -E87-.
Checking cooling performance, see A/C SYSTEM COOLING PERFORMANCE, TESTING .
Service work on refrigerant circuit, see REFRIGERANT CIRCUIT, SERVICING .
Components marked with an * will be activated during the OUTPUT DIAGNOSTIC TEST MODE (DTM) .
Electrical testing is possible on all components marked with ** . See AIR CONDITIONING, ELECTRICAL TESTING .
Rear passenger vent "Center" and air ducts in climate control unit in passenger compartment. See AIR DISTRIBUTION IN AIR CONDITIONER AND BODY .
Instrument panel outer panel, removing and installing:
See INSTRUMENT PANEL .

NOTE: Items 1 through 12 in the following list refer to Fig 1.

Actuator for temperature flap left -V158-*
- With Potentiometer-actuator for temperature flap left -G220-.
- Removing and installing, see ACTUATOR FOR TEMPERATURE FLAP LEFT -V158-, REMOVING AND INSTALLING .
Sender for outlet temperature, floor outlet -G192- **
- Removing and installing, see SENDER FOR OUTLET TEMPERATURE, FLOOR OUTLET -G192-, REMOVING AND INSTALLING .
Not for USA Heater element for auxiliary heater -Z35-*
Heater core
- Removing and installing, see HEATER CORE, REMOVING AND INSTALLING .
Kick down switch
- The A/C clutch can be switched off by the Engine Control Module (ECM), depending on the current vehicles speed and the desired acceleration. See READ MEASURING VALUE BLOCK (FUNCTION 08) .
Data Link Connector (DLC) for VAG 1551 Scan Tool
- Connect VAG 1551 scan tool and check Climate Control System. See ON BOARD DIAGNOSTIC (OBD), INITIATING .
Left Vent Temperature Sensor -G150- **
- Removing and installing, see LEFT VENT TEMPERATURE SENSOR -G150-, REMOVING AND INSTALLING .
Instrument panel vent, left
- Removing and installing, see LEFT INSTRUMENT PANEL VENT, REMOVING AND INSTALLING .
Defroster vent for side window, left
- Removing and installing, see LEFT AND RIGHT SIDE WINDOW DEFROSTER VENTS, REMOVING AND INSTALLING .
Outside Air Temperature Display -G106- *
- The outside air temperature can be displayed in °C or in °F, depending on setting of A/C Control Head -E87-.
NOTE: If the display shows incorrect temperatures, check measuring values of temperature sensors. See READ MEASURING VALUE BLOCK (FUNCTION 08) .
Windshield defroster vent
- Removing and installing, see WINDSHIELD DEFROSTER VENT, REMOVING AND INSTALLING .
Sunlight Photo Sensor -G107- **
- Removing and installing, see SUNLIGHT PHOTO SENSOR -G107-, REMOVING AND INSTALLING .
NOTE: Items 13 through 28 in the following list refer to Fig 2.
A/C control head -E87-
- Removing and installing, see A/C CONTROL HEAD -E87-, REMOVING AND INSTALLING .
- Different versions on vehicles with or without heated seats.
- Different versions on vehicles with or without Radio-Navigation system.
- Different versions on vehicles with Climate Control systems "1", "2" and "3", see A/C CONTROL HEAD -E87-, REMOVING AND INSTALLING .
- Different versions on vehicles up to model year 2001 and from model year 2002.
NOTE: The display panel and control buttons are illuminated with LEDs.
Instrument Panel Interior Temperature Sensor -G56- and Interior Temperature Sensor Fan -V42-
- Integrated into A/C Control Head -E87-, cannot be replaced individually.
Air conditioning unit with evaporator
- Removing and installing, see COMPLETE AIR CONDITIONER UNIT, REMOVING AND INSTALLING .
- Different versions, see AIR CONDITIONING CHANGES
- Disassembling and assembling, see A/C UNIT, DISASSEMBLING AND ASSEMBLING .
WARNING: Only remove the air conditioning unit (condenser) when the refrigerant has been discharged from the A/C system.
Footwell vent
- Can only be replaced when air conditioner unit is removed.
Central Air Flap Motor -V70-*
- With Potentiometer-actuator for temperature flap left -G112-.
- Removing and installing, see CENTRAL AIR FLAP MOTOR -V70-, REMOVING AND INSTALLING .
Actuator for temperature flap right -V159-*
- With Potentiometer-actuator for temperature flap left -G221-.
- Removing and installing, see ACTUATOR FOR TEMPERATURE FLAP RIGHT -V159-, REMOVING AND INSTALLING .
Defroster flap motor -V107- *
- With Potentiometer-actuator for temperature flap left -G135-.
- Removing and installing, see DEFROSTER FLAP MOTOR -V107-, REMOVING AND INSTALLING .
- Different versions on vehicles with air conditioning units "1" and as version "2".
Fresh Air Blower -V2-**
- Removing and installing, see FRESH AIR BLOWER -V2-, REMOVING AND INSTALLING .
- Different versions on vehicles with air conditioning units version "1" and version "2".
Right Vent Temperature Sensor -G151- **
- Removing and installing, see RIGHT VENT TEMPERATURE SENSOR -G151-, REMOVING AND INSTALLING .
Instrument panel vent, right
- Removing and installing, see LEFT INSTRUMENT PANEL VENT, REMOVING AND INSTALLING .
Defroster vent for side window, right
- Removing and installing, see LEFT AND RIGHT SIDE WINDOW DEFROSTER VENTS, REMOVING AND INSTALLING .
Fresh Air Intake Duct Temperature Sensor -G89- **
- Removing and installing, see FRESH AIR INTAKE DUCT TEMPERATURE SENSOR -G89-, REMOVING AND INSTALLING .
Air Flow Flap Motor -V71- * (on vehicles up to model year 2001)
- Actuates air flow flap and fresh air/recirculated air flap
- With Back Pressure Flap Motor Position Sensor -G113- (Recirculation Flap Motor Position Sensor -G143-)
- Removing and installing, see AIR FLOW FLAP MOTOR -V71-, REMOVING AND INSTALLING (VEHICLES UP TO MODEL YEAR 2002) .
Control module for fresh air blower -J126- **
- Removing and installing, see CONTROL MODULE FOR FRESH AIR BLOWER -J126-, REMOVING AND INSTALLING .
Evaporator housing drain
- Checking, see EVAPORATOR HOUSING DRAIN VALVE, CHECKING, REMOVING AND INSTALLING .
Instrument panel vent, center
- Removing and installing, see CENTER INSTRUMENT PANEL VENT, REMOVING AND INSTALLING .
Fig 2: Identifying A/C System Components (In Passenger Compartment, Items 13 To 28)
Courtesy of AUDI OF AMERICA, INC.

NOTE: Items 29 through 32 in the following list refer to Fig 3.
Sealing plug* (Vehicles from model year 2002)
- Only on vehicles with compressor using A/C Clutch -N25- (Evaporator Vent Temperature Sensor -G263- is not installed, the opening in the air conditioning unit is closed using a sealing plug)
Evaporator Vent Temperature Sensor -G263- * (vehicles from model year 2002)
- Only installed in vehicles with compressor using A/C Compressor Regulator Valve -N280-
- Removing and installing, see EVAPORATOR VENT TEMPERATURE SENSOR -G263-, REMOVING AND INSTALLING
Recirculation Flap Motor -V113-* (vehicles from model year 2002)
- With Recirculation-Flap Motor Position Sensor -G143-
- Removing-and installing, see RECIRCULATION FLAP MOTOR -V113-, REMOVING AND INSTALLING (VEHICLES FROM MODEL YEAR 2002)
Air Flow Flap Motor -V71-* (vehicles from model year 2002)
- With Back Pressure Flap Motor Position Sensor -G113-
- Removing and installing, see AIR FLOW FLAP MOTOR -V71-, REMOVING AND INSTALLING (VEHICLES UP TO MODEL YEAR 2002)
Fig 3: Identifying A/C System Components (In Passenger Compartment, Items 29 To 32) - Vehicles From Model Year 2002
Courtesy of AUDI OF AMERICA, INC.