ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -3-.
– Pull off and remove refrigerant line -2-.
Installing
Install in reverse order of removal, observing the following:
– Make sure that refrigerant lines are properly seated, and
tighten them.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
3.28
Removing and installing refrigerant
line, R744
3.28.1
Removing and installing refrigerant line
between air conditioner compressor
VX81 and dryer
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
3. Refrigerant circuit
61
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Removing
Seal off open pipes/lines and connections immediately with
clean plugs from engine bung set -VAS 6122-.
– Perform function “Opening electrically actuated valves in re‐
frigerant circuit for extracting, evacuating and charging” with
⇒ Vehicle diagnostic tester ⇒ Rep. gr. 00; Starting diagnosis.
– ⇒ Air conditioners with refrigerant R744 - General informa‐
tion; Rep. gr. 87; Working with the air conditioner service
station; Discharging refrigerant circuit.
– Remove air intake box of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake box of
heater and air conditioning unit.
– Remove underbody trim (front) ⇒ General body repairs, ex‐
terior; Rep. gr. 66; Underbody trim; Removing and installing
underbody trim (front).
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolt -3- securing refrigerant line from air conditioner
compressor -VX81- to dryer.
– Remove bolt -3- securing refrigerant line -2-.
62
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Detach refrigerant line -2-.
– Mark electrical connector -5- to avoid interchange and un‐
plug it.
– Remove refrigerant line -1-.
Installing
Installation is carried out in reverse order; note the following:
– Install seals and retaining elements, making sure they are
free of oil.
– Perform function “Opening electrically actuated valves in re‐
frigerant circuit for extracting, evacuating and charging” with
⇒ Vehicle diagnostic tester ⇒ Rep. gr. 00; Starting diagnosis.
– ⇒ Air conditioners with refrigerant R744 - General informa‐
tion; Rep. gr. 87; Working with the air conditioner service
station; Charging refrigerant circuit
Tightening torques
♦ ⇒ Rep. gr. 87; Exploded view - refrigerant lines
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
trim; Exploded view - underbody trim
3.28.2
Removing and installing refrigerant line
between air conditioner compressor
[VX81] and valve block [N641]/[N640]
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
3. Refrigerant circuit
63
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
– Remove front underbody cladding ⇒ General body repairs,
exterior; Rep. gr. 66; Underbody cladding; Removing and
installing front underbody cladding.
– Disconnect electrical connector -3-.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
64
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – air conditioner compres‐
sor
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
cladding; Assembly overview – underbody cladding
3.28.3
Removing and installing refrigerant line
between dryer and gas cooler
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove front underbody cladding ⇒ General body repairs,
exterior; Rep. gr. 66; Underbody cladding; Removing and
installing front underbody cladding.
– Mark (to avoid interchanging) and disconnect electrical con‐
nector -4-.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
3. Refrigerant circuit
65
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – air conditioner compres‐
sor
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
cladding; Assembly overview – underbody cladding
3.28.4
Removing and installing refrigerant line
between gas cooler and refrigerant
shut-off valve 2 [N640]
Special tools and workshop equipment required
♦ counter-hold tool -T10630-
♦ counterhold tool -T10630-
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
– Remove lock carrier ⇒ General body repairs, exterior; Rep.
gr. 50; Lock carrier; Removing and installing lock carrier.
– Insert counter-hold tool -T10630- -3-.
66
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– When tightening bolts -2-, use counterhold tool -T10630-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ General body repairs, exterior; Rep. gr. 50; Lock carrier;
Assembly overview – lock carrier
3.28.5
Removing and installing refrigerant line
between refrigerant shut-off valve 3
[N641] and heat condenser
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
3. Refrigerant circuit
67
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
68
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
3.28.6
Removing and installing refrigerant
line between expansion valve [N638]/
[N637] and evaporator
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
– Mark (to avoid interchanging) and disconnect electrical con‐
nector -3-.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
3. Refrigerant circuit
69
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.28.7
Removing and installing refrigerant line
between valve unit of heat pump and
evaporator
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
– Pull off and remove refrigerant line -1-.
70
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.28.8
Removing and installing refrigerant
line between expansion valve [N636]/
[N696] and heat condenser
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
3. Refrigerant circuit
71
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Pull off and remove refrigerant line -2-.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.29
Disconnecting/connecting refrigerant
lines from/to condenser/gas cooler,
R1234yf
3.29.1
Disconnecting/connecting refrigerant
lines from/to condenser
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Disconnecting
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
– Remove lock carrier ⇒ General body repairs, exterior; Rep.
gr. 50; Lock carrier; Removing and installing lock carrier.
– Remove front underbody cladding ⇒ General body repairs,
exterior; Rep. gr. 66; Underbody cladding; Removing and
installing front underbody cladding.
72
Rep. gr.87 - Air conditioning system
2024 VW ID.4 Owner's Manual
