Removing and installing expansion valve with refrigerant circulation solenoid valve N43 — VW

Removing and installing expansion valve with
refrigerant circulation solenoid valve
N43
Special tools and workshop equipment required
Air conditioner service station
VAS 6007A
or later model.
Torque wrench
V.A.G 1783
WARNING
Danger from escaping pressurised refrigerant!
Freezing of skin and other body parts.
Extract refrigerant and then immediately open refrigerant circuit.
If the refrigerant was extracted more than 10 minutes before the opening of refrigerant circuit, the refrigerant must be extracted again. The pressure in the circuit will increase due to subsequent evaporation.
Removing
Extract refrigerant from refrigerant circuit, e.g. with
air conditioning service station
VAS 6007A
(or later model).
Note
Releasing refrigerant into the environment is a punishable offence.
All components of the refrigerant circuit which have been opened must be sealed with suitable plugs to prevent moisture intrusion.
The evaporator is removed together with the expansion valve and the
refrigerant circulation solenoid valve
N43
.
Remove upper cover
Chapter
Remove insulation and upper air duct
Chapter
Remove
rear temperature flap control motor
V137
Chapter
Remove
rear evaporator temperature sender
G153
Chapter
Remove front trim panel with air vent
Chapter
Remove trim panel for heat exchanger housing
Chapter
Remove rear trim panel with air vent
Chapter
Remove centre trim panel with air vent
Chapter
Remove insulation/seal
1
from block connection of refrigerant lines on heat exchanger housing.
Note
The insulation/seal of the refrigerant lines
1
must be restored after successful repair. It serves to prevent condensation forming on the components and dripping into the vehicle on the inside.
A suitable material for restoring the insulation/seal can be found in the
Parts catalogue
.
Unscrew nut
2
of refrigerant line and separate refrigerant line from block connection. (Torque setting of nut
2
is 5 Nm.)
Unscrew nut
1
of refrigerant line and separate block connection with refrigerant line from expansion valve.
Separate electrical connection
1
from
refrigerant circulation solenoid valve
N43
.
Remove screws
3
and take off retaining strip
4
from evaporator.
Remove evaporator with expansion valve and
refrigerant circuit solenoid valve
N43
in
direction of arrow
out of heat exchanger housing.
Remove insulation/seal
2
from expansion valve from
refrigerant circulation solenoid valve
N43
.
Note
The insulation/seal of the refrigerant lines and expansion valve
2
must be restored after successful repair. It serves to prevent condensation forming on the components and dripping into the vehicle on the inside.
A suitable material for restoring the insulation/seal can be found in the
Parts catalogue
.
Unscrew bolts
3
and remove expansion valve with
refrigerant circulation solenoid valve
N43
from evaporator
1
.
Remove O-rings from lines of evaporator
1
.
Seal lines of evaporator
1
using suitable plugs/caps.
Installing
Install in reverse order.
Tightening torques
Component
Specified torque
Nut
1
on refrigerant line
5 Nm
Bolt
3
on evaporator
2 Nm
Bolt
3
on expansion valve
5 Nm
All O-rings of lines and connections must always be renewed.