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.
A/C refrigerant system, checking pressures: Checking: Notes
2001 Audi A6 Avant QuattroSECTION Notes
- Switch ignition off.
- Connect high pressure hose of refrigerant recovery/recycling/recharging unit Kent-Moore ACR4 , or equivalent, to high pressure service connection. See A/C SYSTEM, QUICK COUPLING CONNECTIONS .
- Leave low pressure hose of refrigerant recovery/recycling/recharging unit disconnected.
NOTE:
Only the high pressure service valve is used for A/C system servicing. Perform all A/C system service operations (i.e. discharging, evacuating and charging) through the high pressure service valve only.
TEMPERATURE AND REFRIGERANT SYSTEM PRESSURE
| Outside (ambient) temperature((1)) | Base pressure in refrigerant system (engine OFF) | ||
|---|---|---|---|
| +15°C (59°F) | 3.9 bar (56.5 psi) | ||
| +20°C (68°F) | 4.7 bar (68.2 psi) | ||
| +25°C (77°F) | 5.6 bar (81 .2 psi) | ||
| +30°C (86°F) | 6.7 bar (97.2 psi) | ||
| +35°C (95°F) | 7.8 bar (11 3.1 psi) | ||
| +40°C (104°F) | 9.1 bar (132.0 psi) | ||
| +45°C (113°F) | 10.5 bar (152.3 psi) | ||
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RENDER: 1.0x
NO RELATED
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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.