Audi A4 Owners & Service Manuals

Audi A4: Switches and Sensors on Refrigerant Circuit and Connections

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 A/C Refrigerant High Pressure Switch -F23-

  Note Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit → Heating, Ventilation and Air Condit

 A/C Pressure Switch -F129-

  Note Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit → Heating, Ventilation and Air Condit

 A/C Pressure/Temperature Sensor

There are different versions of this sensor with different functions and with different names. For exact name, allocation and notes doe the respective function, refer to → Heating, Ventilatio

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 Finishing

Reinstall any covers on the wheel bolts that were removed. Store the vehicle tool kit in its designated place. If the removed wheel does not fit in the spare wheel well, store it securely in the luggage compartment. Check the tire pressure on the installed wheel as soon as possible. Corre

 Coolant System/Coolant

Connection Diagram - Coolant Hoses Connection Diagram - Coolant Hoses, Versions without Parking Heater   Note Blue = large coolant circuit. Red = small coolant circuit. Brown = heating circuit. Green = coolant circuit for the transmission. The arrows show the coolant flow direction. 1&

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