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HOMESERVICE MANUALSAUDI2001A6 AVANT QUATTROREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING
2001 Audi A6 Avant Quattro
Air Conditioning
2001 Audi A6 Avant QuattroSECTION Air Conditioning
- A/C system, safety precautions
- A/C system, general repair guidelines
- A/C system, overview
- Refrigerant circuit, servicing
- A/C system components (in engine compartment)
- A/C system components (in passenger compartment)
- Notes
- A/C control head -E87-, removing and installing
- Control module for fresh air blower -J126-, removing and installing
- Fresh air blower -V2-, removing and installing
- Sender for outlet temperature, floor outlet -G192-, 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
- Fresh air intake duct temperature sensor -G89-, removing and installing
- Sunlight photo sensor -G107-, removing and installing
- Defroster flap motor -V107-, removing and installing
- Actuator for temperature flap left -V158-, removing and installing
- Actuator for temperature flap right -V159-, removing and installing
- Central air flap motor -V70-, removing and installing
- Air flow flap motor -V71-, removing and installing (vehicles up to model year 2002)
- Recirculation flap motor -V113-, removing and installing (vehicles from model year 2002)
- Instrument panel vent removal tool, making
- Center instrument panel vent, removing and installing
- Left instrument panel vent, removing and installing
- Windshield defroster vent, removing and installing
- Right instrument panel vent, removing and installing
- Left and right side window defroster vents, removing and installing
- Heater core, removing and installing
- Air conditioning changes
- Air distribution in air conditioner and body
- A/C system cooling performance, testing
- A/C system, checking and testing
- A/C refrigerant system, leak testing
- A/C refrigerant system, testing with pressure gauges
- A/C refrigerant system, checking pressures
- A/C refrigerant system (R-134a), discharging
- A/C refrigerant system (R-134a), evacuating and recharging
- A/C refrigerant system (R-134a), flushing with compressed air and nitrogen
- A/C refrigerant system, servicing
- Notes
- A/C refrigerant R-134a and refrigerant oil (PAG), capacities
- Vehicles with compressors with A/C clutch -N25-
- Refrigerant lines from Denso compressor (with A/C clutch -N25-), removing and installing
- Denso compressor, removing and installing from bracket (8 cyl. engine with A/C clutch - N25-)
- Compressor (with A/C Clutch -N25-), removing and installing
- Compressor with A/C compressor regulator valve -N280-, removing and installing from bracket
- Compressor belt pulley/ drive unit, replacing (compressor without A/C clutch)
- Belt pulley, replacing
- Pulley, removing from compressor and installing
- 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 refrigerant circuit, servicing (compressor with A/C compressor regulator valve -N280-)
- Condenser, removing and installing
- Refrigerant lines on evaporator, disconnecting and connecting
- Restrictor, removing and installing
- Refrigerant lines on compressor, disconnecting and connecting (compressor with A/C compressor regulator valve -N280-)
- Compressor (with A/C Compressor regulator valve -N280-), removing and installing (in a vehicles with 6 cyl. engine)
- A/C system, running after installation of compressor
- Compressor for Audi Allroad with 8 cyl. engine, removing and installing
- Refrigerant lines for condenser, removing and installing
- Refrigerant lines for condenser with block connection, removing and installing
- Catch reservoir (Accumulator), removing and installing
- Capacities
- Compressor bracket, removing and installing (6 cyl. engine, compressor with A/C clutch -N25-)
- Complete air conditioner unit, removing and installing
- A/C unit, disassembling and assembling
- Air distribution housing, disassembling and assembling
- Air duct with intake housing, disassembling and assembling
- A/C system, troubleshooting
- A/C system, replacing components
- Notes
- For leaking or damaged components (except for compressor and accumulator), A/C system was completely empty (no charge):
- For leaky or damaged components (except for the compressor and accumulator) there is still refrigerant in the A/C system:
- Replace compressor, without it being necessary to blow through the refrigerant system with compressed air and nitrogen (e.g. exterior damage after an accident):
- Replace compressor due to leaks or interior damage (e.g. noises or no power):
- Replace accumulator and restrictor after blowing through the A/C system e.g. caused by penetrating moisture (the A/C system was open over a long period of time) or contamination (dirt):
- Replace accumulator, without it being necessary to blow through A/C system with compressed air and nitrogen (e.g. damage caused by an accident), no refrigerant flowed out and no moisture and dirt have penetrated the circuit:
RENDER: 1.0x
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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.