Audi A4: 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 Conditioning; Rep. Gr.87; System Overview - Refrigerant Circuit (vehicle-specific repair manual).
Function:
Switches the coolant fan to the next higher level when the pressure in the refrigerant circuit increases (approximately 16 bar (232 psi) ).
Magnetic Clutch High Pressure Switch -F118-
Note
Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit → Heating, Ventilation and Air Conditioning; Rep. Gr.87; System Overview - Refrigerant Circuit (vehicle-specific repair manual).
Function:
Switches off A/C compressor when there is excessive pressure in the refrigerant circuit (approximately 32 bar (464 psi) ).
A/C Refrigerant Low Pressure Switch -F73-
Note
Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit → Heating, Ventilation and Air Conditioning; Rep. Gr.87; System Overview - Refrigerant Circuit (vehicle-specific repair manual).
Function:
Switches off A/C compressor when there is excessive pressure in the refrigerant circuit (approximately 2 bar (29 psi) ).
Refrigerant Circuit Connections with Valve for Switches
Note
Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit → Heating, Ventilation and Air Conditioning; Rep. Gr.87; System Overview - Refrigerant Circuit (vehicle-specific repair manual).
- Different threads for switch on high pressure and low pressure sides.
- Only valves and O-ring seals that are resistant to refrigerant R134a and refrigerant oil must be installed.
A - Connection (soldered in)
B - O-ring seal
C - Valve (with O-ring seal)
Note
To remove and install the valve insert -C- when the refrigerant circuit is discharged, use, for example, an adapter from the Refrigerant Sockets -T10364- (for the tightening specification. Refer to → Chapter "Connections with Schrader Valve (Needle Valve)").
READ NEXT:
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
Refrigerant Circuit Pressures and Temperatures
General Information
Caution
When performing work on refrigerant circuit, observe
all generally applicable safety precautions and pressure
container regulations.
The pressures and temperatur
SEE MORE:
Impact Member, Removing and Installing
Follow the safety precautions. Refer to
→ Body Interior; Rep. Gr.00; Safety Precautions; Safety
Precautions when Working on Pyrotechnic Components.
- Remove the bumper cover. Refer to
→ Chapter "Bumper Cover, Removing and Installing".
- Remove the washer nozzle
Driver Side Instrument Panel Cover, Removing and Installing
Removing
- Remove the driver side instrument panel side cover. Refer to
→ Chapter "Instrument Panel Side Cover, Removing and Installing".
- Equipped on some models: Open the storage compartment cover
-1- and remove the screws
-arrows B-.
- Remove the screws -arrows A-.
- U
