Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2007S8REPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)A/C COMPRESSORHEATING AIR CONDITIONING
2007 Audi S8
Heating Air Conditioning
2007 Audi S8SECTION Heating Air Conditioning
- 01 - On Board Diagnostic (OBD)
- Automatic Climate Control System, On Board Diagnostic (OBD)
- On Board Diagnostic (OBD), procedure
- Checking DTC memory
- Output Diagnostic Test Mode (DTM)
- Basic Setting
- Erasing DTC memory, End Output
- Climatronic Control Module J255 , coding
- Read Measuring Value Block
- Read Measuring Value Block
- Read measuring value block (Climatronic Control Module J255)
- List of available display group numbers "001" to "019"
- List of available display group numbers "020" to "039"
- List of available display group numbers "040" to "050"
- Display groups front for Climatronic Control Module J255 which are not currently not intended for service use
- Reading measured value block (Rear A/C Control Head (Climatronic) E265)
- List of available display group numbers "001" to "007" ("008")
- Climatronic Control Module J255 and Rear A/C Control Head (Climatronic) E265 , adaptation
- A/C System, electrical checks
- Electrical checks on components actuated by Climatronic Control Module J255 (and Rear A/C Control Head (Climatronic) E265)
- 87 - Air conditioning
- A/C Refrigerant Circuit
- A/C Refrigerant Circuit, general notes
- A/C Refrigerant Circuit, servicing
- A/C Refrigerant Circuit, servicing
- Exploded view of components
- High Pressure Sensor G65 , removing and installing
- Pressure signal of High Pressure Sensor G65 , checking
- Refrigerant circuit O-rings
- Removing compressor from bracket and installing in vehicles with 8-cyl. MPI engine
- A/C Compressor Regulator Valve N280 cut-in signal, checking
- Servicing refrigerant circuit
- Refrigerant lines, disconnecting and connecting at compressor
- A/C compressor, removing and installing (basic guidelines)
- A/C compressor, removing and installing - vehicles with 8-cyl. FSI engine
- Compressor, removing from bracket and re-installing - vehicles with 12-cyl. engine
- Compressor, removing and installing - vehicles with 10-cyl. engine (Audi S8)
- Compressor drive unit, checking, replacing
- Compressor drive shaft, loosening and tightening
- Compressor drive shaft, removing and installing
- Drive plate with overload protection, removing and installing
- Drive plate with overload protection, checking run-out and adjusting
- Drive plate, removing from compressor and installing
- Drive plate with roller bearing, removing and installing
- Detaching refrigerant lines from condenser/re-attaching
- Condenser, removing and installing
- Restrictorss, removing and installing
- Accumulator, removing and installing
- Refrigerant lines, disconnecting from evaporator connection and connecting
- Evaporator, removing and installing
- Capacities
- A/C Compressor Pulley
- Components for control and regulation of air conditioner not located in passenger compartment
- Components for control and regulation of air conditioner not located in passenger compartment
- Components not located in passenger compartment
- Dust and pollen filter, removing and installing
- Dust and pollen filter with activated charcoal filter element
- A/C system evaporator, cleaning using Ultrasonic HVAC Cleaning System VAS 6189
- Air Quality Sensor G238 removing and installing
- Air Quality Sensor G238 , mode of operation
- Air Quality Sensor G238 , checking
- Ventilation system frame, checking
- Plenum chamber water drain, checking and cleaning
- Intake housing with air flow flap, removing and installing
- Air Flow Flap Motor V71 with Back Pressure Flap Motor Position Sensor G113 , removing and installing
- Preparing adapter cables for control motor actuation
- Fresh Air Intake Duct Temperature Sensor G89 removing and installing
- Recirculation Flap Motor V113 removing and installing
- Cover with recirculated-air flap, removing and installing
- Fresh Air Blower V2 , removing and installing
- Fresh Air Blower Control Module J126 , removing and installing
- Pump/valve unit, removing and installing
- Solar roof (where applicable), checking operation
- Heated windshield
- Components for control and regulation of air conditioner located in passenger compartment
- Components for control and regulation of air conditioner located in passenger compartment
- Components located in passenger compartment
- Left Center Vent Motor V110 , removing and installing
- Right Center Vent Motor V111 , removing and installing
- Center Outlet Temperature Sensor G191 , removing and installing
- Sunlight Photo Sensor G107 , removing and installing
- Interior Temperature Sensor Fan V42 , removing and installing
- Climatronic Control Module J255 , removing and installing
- Left Rear Footwell Heater Z42/Right Rear Footwell Heater Z43 , removing and installing
- Left Rear Center Console Temperature Sensor G311 and Right Rear Center Console Temperature Sensor G312 removing and installing
- Left Rear Warm/Cold Flap Air Outlet Motor V220 , removing and installing
- Right Rear Warm/Cold Flap Air Outlet Motor V221 , removing and installing
- Rear A/C Control Head (Climatronic) E265 , removing and installing
- Evaporator drain hose, removing, checking and installing
- Air conditioner unit components located in passenger compartment
- Defroster Flap Motor V107 removing and installing
- Center Vent Adjustment Motor V102 , removing and installing
- Left Front Defrost/Upper Body Shut-off Flap Motor V200 removing and installing
- Right Front Defrost/Upper Body Shut-off Flap Motor V199 removing and installing
- Left Footwell Flap Motor V108 , removing and installing
- Right Footwell Flap Motor V109 , removing and installing
- Temperature Regulator Flap Motor V68 , removing and installing
- Left Vent Temperature Sensor G150 , removing and installing
- Right Vent Temperature Sensor G151 , removing and installing
- Evaporator Vent Temperature Sensor G263 , removing and installing
- Left Rear Air Outlet Motor V218 and Right Rear Air Outlet Motor V219 , removing and installing
- Heater Core, removing and installing
- Air distribution system, block diagram
- A/C cooling output, checking
- A/C system heat output and pump valve unit, checking
- Heating and A/C unit, removing and installing
- Heating and A/C unit, disassembling and assembling
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.