This comprehensive service manual covers the heating, ventilation, and air conditioning (HVAC) system of your 1978-1985 Porsche 928. Detailed instructions and diagrams guide you through every aspect of your car's HVAC system, empowering you to perform repairs and restoration with confidence. This manual is the same resource used by professionals and technicians, providing you with the technical expertise previously only accessible to experts. You'll gain a thorough understanding of the intricate workings of your 928's HVAC system, enabling you to diagnose issues effectively and avoid costly, unnecessary repairs. With this manual, you'll have the knowledge and tools to maintain and restore your classic Porsche to its original glory.

The 1978-1985 Porsche 928 featured a sophisticated Heating, Ventilation, and Air Conditioning (HVAC) system designed to provide occupants with optimal comfort in a variety of driving conditions. This system, a testament to Porsche's engineering prowess, incorporated a blend of technology and thoughtful design. The system's core components included a powerful blower motor responsible for circulating air throughout the cabin, a heater core for generating warm air, and an evaporator for producing cold air using the refrigerant R12. The 928's HVAC system also featured multiple vents strategically placed throughout the cabin, allowing for precise airflow control and temperature regulation. Furthermore, the system incorporated controls for fan speed, temperature, and airflow direction, granting occupants the ability to customize their comfort experience. The 1978-1985 Porsche 928's HVAC system was known for its efficiency and reliability. The system's robust construction and carefully chosen materials ensured long-lasting performance, even under demanding conditions. The use of R12 refrigerant, while later replaced for environmental reasons, contributed to the system's effectiveness in cooling the cabin during hot weather. Moreover, the HVAC system's integration with the 928's overall design seamlessly blended functionality with aesthetics. The vents and controls were carefully integrated into the cabin's interior, adding to the vehicle's luxurious and driver-focused experience. Throughout the 1978 to 1985 model years, the 928's HVAC system remained a key element in the car's overall appeal, providing a comfortable and enjoyable driving experience for both drivers and passengers alike.