Heat Pump Operation Heater Core
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2017 Audi S3, 2017 Audi RS 3, 2017 Audi A3 Quattro, 2017 Audi A3, and 2016 Audi S3. However, it is still accessible from the selected car via links, so may be relevant.
The gaseous or vaporous refrigerant that is compressed by the A/C compressor becomes a liquid in the heater core -A-. At the same time, the heat that is released is transferred to the coolant flowing by. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).