ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
If heat exchanger is renewed:
– Adjust quantity of refrigerant oil ⇒ Air conditioners with refrig‐
erant R1234yf - General information; Rep. gr. 87; Refriger‐
ant circuit; Renewing components.
If coolant expansion tank was completely empty:
– ⇒ Rep. gr. 19; Cooling system/coolant; Draining coolant
– ⇒ Rep. gr. 19; Cooling system/coolant; Filling cooling system
– Fill up with coolant ⇒ Rep. gr. 19; Cooling system/coolant;
Filling cooling system.
– ⇒ Rep. gr. 19; Cooling system/coolant; Checking filling quali‐
ty
Important
•
Should there be air in the coolant circuit, it must be bled
⇒ Rep. gr. 19; Cooling system/coolant; Filling cooling system
Tightening torques
♦ ⇒ Rep. gr. 87; Exploded view - refrigerant lines
♦ ⇒ Rep. gr. 87; Exploded view - heat exchanger for high-volt‐
age battery
♦ ⇒ Rep. gr. 87; Exploded view - air intake box of heater and
air conditioning unit
3.24
Removing and installing heat exchang‐
er for high-voltage battery, R744
3.24.1
Removing and installing heat exchang‐
er for high-voltage battery
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.
If heat exchanger is renewed:
– Observe procedure for renewal of refrigerant circuit compo‐
nents ⇒ Air conditioning system with refrigerant R744 – Gen‐
eral notes; Rep. gr. 87; Refrigerant circuit; Renewing compo‐
nents.
– ⇒ Rep. gr. 87; Removing and installing desiccant bag.
– Before dismantling the heat pump valve unit, mark electrical
connectors and refrigerant lines accordingly.
48
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 -1-, -2-, -3- and -4-.
– Pull off refrigerant lines.
– Unscrew bolts -1-.
– Disconnect electrical connectors.
– Remove heat exchanger -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.
3. Refrigerant circuit
49
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – valve unit of heat pump
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.25
Removing and installing heat condens‐
er, R744
3.25.1
Removing and installing heat condens‐
er
– Heat condenser -11- is currently not available separately
⇒ Electronic parts catalogue (ETKA).
3.26
Removing and installing refrigerant
shut-off valve for heater and air condi‐
tioner unit [N541]
3.26.1
Removing and installing refrigerant
shut-off valve for heater and air condi‐
tioner unit [N541], left-hand drive vehi‐
cles
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-.
– 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.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining air conditioner service station.
– Disconnect electrical connector -4-.
50
Rep. gr.87 - Air conditioning system
2024 VW ID.4 Owner's Manual
