Heating, air conditioner

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety precautions when handling refrigerants
  1
• 1.3 Safety precautions when working on high-voltage system
  2
• 1.4 Safety precautions when working in the vicinity of high-voltage components
  3
• 1.5 Safety measures when working on vehicles with a start/stop system
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions when working on vehicles with auxiliary/supplementary heater
  3
• 2 General information
  5
• 2.1 Notes concerning odours in air conditioned vehicles
  5
• 2.2 Notes for vehicles with start-stop system
  5
• 3 Repair notes
  6
• 3.1 Working on refrigerant circuit
  6
• 3.2 General repair instructions
  6
• 3.3 Refrigerant circuit seals
  6
• 3.4 Notes on control motors
  7
• 4 Technical data
  13
• 4.1 Refrigerant capacity
  13
• 4.2 Refrigerant oil
  13
• 4.3 Oil distribution
  13
• Heating
  15
• 1 Heater
  15
• 1.1 Removing and installing fresh air blower V2
  15
• 1.2 Removing and installing fresh air blower series resistor with overheating fuse N24
  15
• 1.3 Removing and installing dust and pollen filter
  15
• 1.4 Checking auxiliary air heater element Z35
  15
• 1.5 Removing and installing auxiliary air heater element Z35
  15
• 1.6 Removing and installing heat exchanger
  15
• 2 Air duct
  16
• 2.1 Removing and installing centre vent
  16
• 2.2 Removing and installing vent on driver or front passenger side
  16
• 2.3 Removing and installing driver side footwell vents
  16
• 2.4 Removing and installing front passenger side footwell vents
  16
• 2.5 Removing and installing rear footwell air duct
  16
• 2.6 Removing and installing fresh air intake
  16
• 2.7 Checking forced ventilation for passenger compartment
  16
• 2.8 Removing and installing forced ventilation for passenger compartment
  17
• 2.9 Removing and installing air intake housing
  17
• 3 Coolant circuit
  18
• 3.1 Removing and installing coolant pipes on heat exchanger
  18
• Air conditioning system
  19
• 1 Overview of fitting locations - air conditioning system
  19
• 2 Refrigerant circuit
  31
• 2.1 System overview - refrigerant circuit
  31
• 2.2 Removing and installing high-pressure sender G65
  35
• 2.3 Removing and installing expansion valve
  39
• 2.4 Removing and installing condenser
  45
• 2.5 Removing and installing receiver
  47
• 2.6 Removing and installing desiccant bag or cartridge
  49
• 2.7 Removing and installing evacuating and charging valves on low and high-pressure side
  52
• 2.8 Removing and installing heat exchanger for high-voltage battery VX63
  55
• 2.9 Removing and installing refrigerant shut-off valve for heater and air conditioner unit N541
  58
• 3 Air conditioner compressor
  63
• 3.1 Assembly overview - drive unit of air conditioner compressor
  63
• 3.2 Removing air conditioning compressor from and installing on bracket
  64
• 3.3 Removing and installing air conditioner compressor
  66
• 3.4 Checking high-pressure safety valve on air conditioner compressor
  73
• 3.5 Removing and installing pulley
  74
• 4 Front heater and air conditioning unit
  77
• 4.1 Assembly overview - heater and air conditioning unit
  77
• 4.2 Assembly overview - evaporator housing
  90
• 4.3 Removing and installing heater and air conditioning unit
  92
• 4.4 Removing and installing evaporator
  102
• 4.5 Dismantling and assembling evaporator housing
  103
• 4.6 Removing and installing fresh air blower series resistor with overheating fuse N24
  104
• 4.7 Removing and installing fresh air blower control unit J126
  105
• 4.8 Removing and installing dust and pollen filter
  106
• 4.9 Removing and installing fresh air blower V2
  108
• 4.10 Checking auxiliary air heater element Z35
  110
• 4.11 Removing and installing auxiliary air heater element Z35
  112
• 4.12 Removing and installing heat exchanger
  116
• 4.14 Checking condensation drain
  127
• 5 Air duct
  129
• 5.1 Removing and installing centre vent
  129
• 5.2 Removing and installing vent on driver or front passenger side
  130
• 5.3 Removing and installing rear footwell air duct
  130
• 5.4 Removing and installing air distribution housing
  131
• 5.5 Removing and installing air intake housing
  134
• 5.6 Removing and installing fresh air intake
  135
• 5.7 Removing and installing driver side footwell vents
  137
• 5.8 Removing and installing front passenger side footwell vents
  139
• 5.9 Removing and installing forced ventilation for passenger compartment
  140
• 5.10 Checking forced ventilation for passenger compartment
  141
• 5.11 Removing and installing glove box cooling
  141
• 6 Coolant circuit
  142
• 6.1 Assembly overview - coolant circuit, Golf blue-e-motion
  142
• 6.2 Removing and installing coolant pipes on heat exchanger
  145
• 6.3 Removing and installing control unit for heater and air conditioning system components
  147
• 6.5 Removing and installing coolant circulation pump before high-voltage PTC heater V509
  149
• 6.8 Removing and installing temperature sender after heat exchanger G787
  154
• 6.9 Removing and installing temperature sender after electric drive motor G788
  156
• 6.11 Removing and installing high-voltage heater (PTC) Z115
  160
• 6.12 Removing and installing heater coolant shut-off valve N279
  162
• 6.13 Removing and installing shut-off valve for high-voltage battery coolant N540
  164
• 7 Operating and display unit
  167
• 7.1 Overview of operating and display unit
  167
• 7.2 Removing and installing operating and display unit
  177
• 8 Control motors
  179
• 8.1 Overview of fitting locations – front control motors
  179
• 8.2 Removing and installing temperature flap control motor V68
  184
• 8.3 Removing and installing defroster flap control motor V107
  186
• 8.4 Removing and installing air recirculation flap control motor V113
  188
• 8.5 Removing and installing left temperature flap control motor V158
  190
• 8.6 Removing and installing right temperature flap control motor V159
  194
• 8.7 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  196
• 8.9 Removing and installing air distribution flap control motor V428
  199
• 8.10 Removing and installing fresh air/air recirculation, air flow flap actuator
  199
• 9 Other controlling and regulating components
  200
• 9.2 Removing and installing air quality sensor G238
  201
• 9.3 Principle of operation of air quality sensor G238
  202
• 9.4 Removing and installing ambient temperature sensor G17
  204
• 9.5 Removing vent temperature sender G150
  205
• 9.6 Removing and installing right vent temperature sender G151
  205
• 9.7 Removing and installing centre vent temperature sender G191
  205
• 9.8 Removing and installing footwell vent temperature sender G192
  206
• 9.9 Removing and installing footwell vent temperature sender G261
  206
• 9.10 Removing and installing right footwell vent temperature sender G262
  207