Repairing components of refrigerant circuit, vehicles 10.00 ▸ — VW

Repairing components of refrigerant circuit, vehicles 10.00 ▸
Note
The refrigerant must be extracted beforehand, e.g. with
air conditioner service station
VAS 6007A
or later model.
The previously used service stations can still be used ⇒ Volkswagen Workshop Equipment catalogue.
Safety measures when working with an extracted refrigerant circuit
Chapter
. Notes on repair work to vehicles with air conditioning and on handling refrigerant.
Only the components marked with an
“*”
can be renewed without opening and evacuating the refrigerant circuit.
To prevent the intrusion of moisture, all components of the refrigerant circuit which have been opened must be sealed with suitable plugs.
The colour coding of O-rings for R134a refrigerant circuits has been discontinued. Coloured and black O-rings are used.
Refrigerant hose
Between air conditioner compressor and reservoir.
Combi-bolt
M8×28
15 Nm
O-ring
17.2 mm; 1.82 mm
Refrigerant hose
Between evaporator and condenser.
Thread 20 mm ∅; pitch 1.5 mm
15 Nm
O-ring
10.8 mm; 1.8 mm
Restrictor
Removing and installing restrictor, function of restrictor
Chapter
.
O-ring
7.5 mm; 1.5 mm
O-ring
10.8 mm; 1.8 mm
Evacuating and charging valve
High-pressure side
Releasing refrigerant into the environment is a punishable offence.
Removing and installing
Chapter
Capacities
Chapter
Protective cap*
O-ring
10.8 mm; 1.8 mm
O-ring
17.2 mm; 1.8 mm
Evaporator
In passenger compartment
Removal
Chapter
, Dismantling and assembling the evaporator housing.
Hexagon socket head bolt
10 Nm
Protective cap*
Evacuating and charging valve
Low-pressure side
Releasing refrigerant into the environment is a punishable offence.
Removing and installing
Chapter
Capacities
Chapter
O-ring
7.6 mm; 1.8 mm
Refrigerant line
Between evaporator and reservoir.
Air conditioner compressor
With
air conditioning system magnetic clutch
N25
.
Manufacturer, Denso (7SB-16C)
Overview - air conditioner compressor manufacturers
Chapter
High-pressure safety valve
Checking
Chapter
O-ring
23.8 mm; 2.4 mm
Socket head bolts
25 Nm
Qty. 2
O-ring
11.1 mm; 1.8 mm
Air conditioning system magnetic clutch
N25
*
Repairs to the magnetic clutch with the air conditioner compressor installed should only be performed only as an exception.
Manufacturer: Denso
Repairing magnetic clutch
Chapter
.
Air conditioner compressor
Manufacturer: Denso, designation: 7SEU16, observe notes
Chapter
.
With no
air conditioning system magnetic clutch
N25
.
Overview - air conditioner compressor manufacturers
Chapter
Air conditioner compressor regulating valve
N280
O-ring
23.8 mm; 2.4 mm
High-pressure safety valve
Checking
Chapter
Socket head bolts
25 Nm
Qty. 2
O-ring
11.1 mm; 1.82 mm
Refrigerant hose
Between air conditioner compressor and condenser
Condenser
Removing
Chapter
O-ring
14 mm; 1.82 mm
O-ring
17.2 mm; 1.82 mm
Hexagon socket head bolt
15 Nm
O-ring
7.6 mm; 1.8 mm
Engine codes BDN, BDP: 10.8 mm; 1.82 mm
Air conditioning system pressure switch
F129
*/
high-pressure sender
G65
*
Checking: use
vehicle diagnosis, testing and information system
VAS 5051A
in
“guided fault finding”
function
Check
air conditioning system pressure switch
F129
Chapter
Renewing: vehicles 10.00 ▸
Chapter
Torque setting 8 Nm
Renew O-ring (note part number).
Function:
Switches
radiator fan
V7
to next higher speed when pressure increases in refrigerant circuit.
Switches off the air conditioner when the pressure is too high (for example, insufficient engine cooling).
Switches off the air conditioner when the pressure is too low (for example, loss of refrigerant).
Reservoir with dryer cartridge
Functions
Chapter
.
Under certain conditions, it is not necessary to renew the reservoir every time that the refrigerant circuit is opened. Refer to workshop manual Heating, ventilation, air conditioning system;
“Air conditioning system with refrigerant R134a”
Rep. Gr.
00
Technical data, Renewing components.
Removing and installing
O-ring
17.2 mm; 1.82 mm