Heating and air conditioning system, Jetta A7

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety measures when working on vehicles with a start/stop system
  1
• 1.4 Safety precautions when working on the cooling system
  2
• 1.5 Safety precautions when handling refrigerants
  2
• 1.6 Safety precautions for working on vehicles with auxiliary/supplementary heater
  3
• 2 General information
  5
• 2.1 Type plates
  5
• 2.2 Notes concerning odours in air conditioned vehicles
  6
• 2.3 Notes for vehicles with start-stop system
  7
• 2.4 Notes on dust and pollen filter
  8
• 3 Repair instructions
  9
• 3.1 Rules for cleanliness
  9
• 3.2 Nuts and bolts
  9
• 3.3 Routing and attachment of lines
  10
• 3.4 Fitting radiators and condensers
  10
• 3.5 Checking heater output
  10
• 3.6 Checking cooling output
  13
• 3.7 Working on refrigerant circuit
  15
• 3.8 Paint work on vehicles with air conditioning system
  16
• 3.9 Refrigerant circuit seals
  16
• 3.10 General repair instructions
  16
• 4 Technical data
  18
• 4.1 Refrigerant capacity
  18
• 4.2 Refrigerant oil capacities
  18
• 4.3 Oil distribution
  18
• Heating
  20
• 1 Overview of fitting locations - heating
  20
• 1.1 Overview of fitting locations - components not located in passenger compartment
  20
• 2 Heater
  22
• 2.1 Assembly overview – heater unit
  22
• 3 Control motors
  28
• 3.1 Overview of fitting locations – control motors at front
  28
• 3.2 Removing and installing fresh air and air recirculation flap control motor V154
  28
• 4 Air duct
  30
• 5 Operating and display unit
  31
• 5.1 Overview of operating and display unit
  31
• 6 Other controlling and regulating components
  33
• Air conditioning system
  34
• 1 Overview of fitting locations - air conditioning system
  34
• 1.1 Overview of fitting locations - components not located in passenger compartment
  34
• 2 Refrigerant circuit
  39
• 2.1 System overview - refrigerant circuit
  39
• 2.2 Assembly overview – condenser
  41
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  43
• 2.4 Removing and installing refrigerant line with internal heat exchanger
  44
• 2.5 Removing and installing expansion valve
  48
• 2.6 Removing and installing condenser
  53
• 2.7 Removing and installing desiccant bag or cartridge
  56
• 2.8 Removing and installing damper weight for refrigerant line, low-pressure side
  61
• 3 Air conditioner compressor
  73
• 3.1 Assembly overview – drive unit of air conditioner compressor
  73
• 3.2 Assembly overview - pulley
  75
• 3.3 Removing air conditioning compressor from and installing on bracket
  77
• 3.4 Removing and installing air conditioner compressor
  79
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  83
• 3.6 Removing and installing pulley
  85
• 4 Control motors
  88
• 4.1 Overview of fitting locations – control motors at front
  88
• 4.2 Removing and installing temperature flap control motor V68
  90
• 4.3 Removing and installing defroster flap control motor V107
  92
• 4.4 Removing and installing air recirculation flap control motor V113
  94
• 4.5 Removing and installing left temperature flap control motor V158
  96
• 4.6 Removing and installing right temperature flap control motor V159
  98
• 4.7 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  100
• 4.8 Removing and installing front air distribution flap control motor V426
  102
• 4.9 Removing and installing air distribution flap control motor V428
  104
• 4.10 Removing and installing air distribution flap actuator
  106
• 5 Front heater and air conditioning unit
  110
• 5.2 Assembly overview - flaps and partitions in air distribution housing
  112
• 5.3 Assembly overview – heater and air conditioning unit
  115
• 5.4 Assembly overview – evaporator housing
  119
• 5.5 Removing and installing evaporator
  120
• 5.6 Checking auxiliary air heater element Z35
  122
• 5.7 Removing and installing auxiliary air heater element Z35
  123
• 5.8 Removing and installing heater and air conditioning unit
  124
• 5.9 Removing and installing holder for heater and air conditioning unit
  131
• 5.10 Dismantling and assembling heater and air conditioning unit
  133
• 5.11 Removing and installing air distribution housing
  135
• 5.12 Removing and installing dust and pollen filter
  135
• 5.13 Removing and installing fresh air blower V2
  138
• 5.14 Removing and installing fresh air blower control unit J126
  139
• 5.15 Removing and installing heat exchanger
  139
• 5.16 Removing and installing coolant pipes on heat exchanger
  145
• 5.17 Removing and installing evaporator temperature sensor G308
  147
• 5.18 Removing and installing condensation drain
  148
• 5.19 Checking condensation drain
  151
• 6 Air duct
  153
• 6.1 Assembly overview – air duct and air distribution in passenger compartment
  153
• 6.2 Removing and installing driver side footwell vents
  154
• 6.3 Removing and installing front passenger side footwell vents
  155
• 6.4 Removing and installing rear footwell vent
  157
• 6.5 Removing and installing air ducts
  158
• 6.6 Removing and installing forced ventilation for passenger compartment
  159
• 6.7 Checking forced ventilation for passenger compartment
  160
• 6.8 Removing and installing fresh air intake
  160
• 6.9 Removing and installing cover for fresh air intake
  162
• 6.10 Removing and installing air intake duct
  162
• 6.11 Removing and installing air duct for defroster vent
  164
• 6.12 Removing and installing air duct for centre dash panel vent
  164
• 7 Operating and display unit
  166
• 7.1 Overview of fitting locations – operating and display unit
  166
• 7.2 Removing and installing operating and display unit
  170
• 8 Other controlling and regulating components
  173
• 8.1 Removing and installing sunlight penetration photosensor G107
  173
• 8.2 Working principles of air quality sensor G238
  174
• 8.3 Removing and installing air quality sensor G238
  175
• 8.4 Removing and installing ambient temperature sensor G17
  176
• 8.5 Removing and installing humidity sender for air conditioning system G260
  176
• 8.6 Removing and installing left vent temperature sender G150
  177
• 8.7 Removing and installing right vent temperature sender G151
  178
• 8.8 Removing and installing footwell vent temperature sender G192
  179