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:
Seat Pan Cover and Cushion, Removing and Installing
Special tools and workshop equipment required
Backrest Panel Tool -3370-
Hook Tool -T40207-
Engine/Transmission Holder - Seat Repair Fixture -VAS6136-
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog prior to
starting procedur
Contact Surface Cleaning Set -VAS6410-
Contact Surface Cleaning Set -VAS6410-, Using
The Contact Surface Cleaning Set -VAS6410- makes optimal
repair quality possible in the realm of vehicle electronics.
Using the tools, service work can be performed in the area of
the contact sensor on the threaded connection wiring harnesses
in the
