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 MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 39 (HEATING & AIR CONDITIONING)
2009 Audi A6 Base
Section 39 (Heating & Air Conditioning)
2009 Audi A6 BaseSECTION Section 39 (Heating & Air Conditioning)
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- 87 Air conditioning
- Safety precautions
- A/C system, general repair guidelines
- Refrigerant system, servicing
- Compressor, removing and installing from bracket
- Belt pulley/drive unit of compressor, replacing
- Belt pulley (version "1"), replacing
- Belt pulley, removing from compressor and reinstalling (version "1")
- Belt pulley (version "2"), replacing
- Belt pulley, removing from compressor and reinstalling (version "2")
- 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
- Run-out of drive plate with overload protection, checking and adjusting
- Drive plate to compressor, removing and installing
- Drive plate with roller bearing, removing and installing
- A/C system control and regulation components
- A/C system control and regulation components
- Components in engine compartment and rear of vehicle
- Dust and pollen filter element, removing and installing
- Dust and pollen filter with active-carbon-filter element
- Air Quality Sensor G238, removing and installing
- Air extraction vent, checking
- Components in passenger compartment
- Climatronic Control Module J255, removing and installing
- Air guide connection for glove compartment cooling, removing and installing
- Fresh Air Blower Control Module J126 and Fresh Air Blower V2, 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 Footwell Vent Temperature Sensor G261, removing and installing
- Right Footwell Vent Temperature Sensor G262, removing and installing
- Sunlight Photo Sensor G107, removing and installing
- Evaporator housing drain, removing and installing
- Evaporator housing drain, checking
- Adapter cable, modifying to activate positioning motors
- Defroster Flap Motor V107, removing and installing
- Right Temperature Flap Motor V159, removing and installing
- Left Temperature Flap Motor V158, removing and installing
- Central Air Flap Motor V70, removing and installing
- Recirculation Flap Motor V113, removing and installing
- Air Flow Flap Motor V71, removing and installing
- Fresh Air Intake Duct Temperature Sensor G89, removing and installing
- Instrument panel vents and air guides
- Heating core, removing and installing
- A/C refrigerant system, testing
- A/C refrigerant system, servicing
- A/C refrigerant system, servicing
- A/C refrigerant system, component overview
- Connections of refrigerant lines to the components (different versions)
- Refrigerant lines on evaporator flange, removing and installing
- Refrigerant lines for condenser, removing and installing
- Condenser, removing and installing
- Restrictor, removing and installing
- Accumulator, removing and installing
- A/C refrigerant system, capacities
- Compressor, removing and installing
- Heating and A/C unit, removing and installing
- Heating and A/C unit, component overview
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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.