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 MANUALSAUDI2018A5 QUATTRO PRESTIGE, 2D CONVERTIBLEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 91 (GENERAL, TECHNICAL DATA (HVAC))
2018 Audi A5 Quattro Prestige, 2D Convertible
Section 91 (General, Technical Data (HVAC))
2018 Audi A5 Quattro Prestige, 2D ConvertibleSECTION Section 91 (General, Technical Data (HVAC))
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2020 Audi S3, 2020 Audi RS 3, 2020 Audi A3 Quattro, 2020 Audi A3, and 2019 Audi S3. However, it is still accessible from the selected car via links, so may be relevant.
- 00 General, Technical Data
- Heater And A/C Unit Identification
- General Information
- Safety Precautions
- Repair Information
- Clean Working Conditions
- General Information
- General Repair Information
- Contact Corrosion
- Routing And Securing Lines
- Cooler And Condenser Assembly
- Heating Output, Checking
- Information On Checking Heat Output And Tools Required
- Heating Output And Temperature Door Actuation, Checking, Vehicles Without A/C System
- Temperature Door Actuation, Checking
- Heating Output And Temperature Door Actuation, Checking, Vehicles With High Voltage System And Automatic Climate Control System
- Cooling Output, Checking
- Information And Tools Required
- Test Requirements
- Cooling Output, Checking
- Cooling Output, Checking, Vehicles With Automatic Climate Control System (With High Voltage System)
- Determining Malfunction If Deviation From Specified Value
- Determining Malfunction Of Temperature Increase Downstream From Evaporator
- Ice Formation On Evaporator, Localizing Malfunction
- Refrigerant Circuit, Discharging
- Working On The Refrigerant Circuit
- Painting On Vehicles With A/C System
- Refrigerant Circuit Seals
- Actuator
- Dust And Pollen Filter
- High Voltage Heater (PTC) -Z115- GENERAL INFORMATION, (AND TO THE High Voltage Heater (PTC) Control Module -J848-)
- Notes For High-Voltage Components And Potential Equalization Cables
- Technical Data
- Specifications
- Special Tools
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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.