Repairing Climatronic - engine compartment — VW

Repairing Climatronic - engine compartment
Note
Parts marked with * can be repaired only by specially trained mechanics in suitable workshops
Chapter
since the refrigerant must be extracted beforehand.
Evaporator*
In passenger compartment
Vacuum hose
Vacuum hose connection diagram
Chapter
To brake servo or to vacuum pump
Water drain pipe
Checking
Fig.
Thermal switch for air conditioning system shut-off
F163
and
thermal switch for radiator fan third speed
F165
Thermal switch for radiator fan third speed
F165
switches radiator fan to third speed as coolant temperature rises (on at 112 °C and off at 108 °C).
Thermal switch for air conditioning system shut-off
F163
switches
air conditioning system magnetic clutch
N25
off when the refrigerant temperature is too high (off at 119° C, on at 112° C)
Removing and installing on vehicles with engine code AAA
Fig.
Air conditioning system coolant temperature sender
G110
Task: the
air conditioning system coolant temperature sender
G110
controls the defroster function/ footwell air distribution and fresh air blower output depending on coolant temperature.
Checking: read and clear fault memory via self-diagnosis
Chapter
Ambient temperature sensor
G17
Function:
ambient temperature sensor
G17
controls temperature flap and fresh air blower, depending on temperature.
Checking: read and clear fault memory via self-diagnosis
Chapter
Connector*
Rotating
Evacuating and charging valve*
High-pressure side.
Condenser*
Hose protection
Evacuating and charging valve*
Low-pressure side.
Note
Depending on the engine version, the evacuating and charging valve may be fitted near the receiver with dryer.
Excess pressure relief valve*
WARNING
Danger of freezing injuries.
When the pressure in the refrigerant circuit is too high (e.g. due to overfilling), refrigerant leaks out of excess pressure relief valve.
Wear protective goggles and suitable clothing.
Checking
Chapter
Air conditioner compressor*
Removing and installing
Chapter
Running-in procedures
Chapter
.
Air conditioning system magnetic clutch
N25
Removing and installing
Chapter
Connector*
Rotating
Receiver with dryer*
Removing and installing
Chapter
Note
Under certain conditions, it is not necessary to renew the receiver with dryer every time that the refrigerant circuit is opened. Refer to the workshop information under Heating, ventilation, air conditioning system; Air conditioning system with refrigerant R134a
Air conditioning system with refrigerant R134a
Rep. gr.
00
Renewing components
.
Connector*
Rotating
Air conditioning system pressure switch
F129
or
high-pressure sender
G65
Checking
air conditioning system pressure switch
F129
Chapter
Torque setting 8 Nm
Renew O-ring (note part number).
Checking
high-pressure sender
G65
:
Vehicle diagnostic tester
in the function "guided fault finding"
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).
Expansion valve*
Removing
Chapter
Insulator
Dust and pollen filter
Removing
Chapter
Checking water drain pipe with lip valve
Note
If water drain pipe
1
has to be replaced, transfer the vehicle to a suitable workshop
Chapter
.
Water drain pipe
The lip valve is only pushed on; it must not be bonded.
Removing and installing
thermal switch for air conditioning system shut-off
F163
and
thermal switch for radiator fan third speed
F165
on vehicles with engine code AAA
Note
Cooling system is pressurized when engine is warm. If necessary, release pressure before carrying out repairs.
Refill with coolant after installing thermal switch
Rep. gr.
19
.
Clip
Thermostat housing
O-ring
Thermal switch for air conditioning system shut-off
F163
/
thermal switch for radiator fan third speed
F165
Coolant temperature display sender
G2
/
thermal switch for fan run-on
F87
Coolant temperature sender
G62