ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
17 - Cover
18 - Bolt
❑ Depending on equipment/vehicle version
❑ 2 Nm
19 - Noise insulation
20 - Gasket
21 - Seal
Mounting on air intake cowling for right-hand drive vehicles
Component
Bolt -3-
Tightening torque
8 Nm
7.5
Removing and installing heater and air
conditioning unit, R1234yf
7.5.1
Removing and installing heater and air
conditioning unit
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-.
DANGER
High voltage can cause fatal injury.
Danger of severe or fatal injuries from electric shock or elec‐
tric arcs.
– Have a high-voltage technician (HVT) or a high-voltage
expert (HVE) de-energise the high-voltage system.
– ⇒ Rep. gr. 93; De-energise high-voltage system.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
– Detach refrigerant line from expansion valve ⇒ Rep. gr. 87;
Detaching/attaching refrigerant line from/to expansion valve.
134
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Remove dash panel cross member ⇒ General body repairs,
interior; Rep. gr. 70; Dash panel cross member; Removing
and installing dash panel cross member.
– Remove rear footwell vent ⇒ Rep. gr. 87; Removing and
installing rear footwell vent.
– Detach air duct for rear centre console vent from heater and
air conditioning unit ⇒ Rep. gr. 87; Removing and installing
air duct for rear centre console vent.
– Disconnect electrical connectors and electrical wire from
heater and air conditioning unit.
NOTICE
Risk of damage to airbag control unit. Electrical connectors
corrode when exposed to moisture.
– After unplugging connectors for control unit, cover them or
seal them off to prevent moisture from entering.
– Cover area under condensation drain with waterproof foil
and absorbent paper.
– Pull condensation drain -2- off connection of heater and air
conditioning unit -1- -arrow A-.
– Disconnect electrical connector - 7-, and loosen retaining
clip -5-.
– Unscrew nut -8-.
– Detach potential equalisation line.
7. Front heater and air conditioning unit
135
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Important
•
The aid of an additional person is required for the subse‐
quent work steps.
– Remove heater and air conditioning unit -1-.
Installing
– Install in reverse order of removal, observing the following:
– Check gasket between heater and air conditioning unit and
bulkhead for damage.
– Make sure that the condensation drain is properly seated
⇒ Rep. gr. 87; Removing and installing condensation drain.
– Check screw connections of potential equalisation line, and
clean them if necessary ⇒ Electrical system; Rep. gr. 97;
Cleaning contact surfaces; Cleaning contact surfaces.
Important
•
Contact surfaces must be free of dirt, rust and grease.
– Connect potential equalisation line, and tighten nut -8-.
– Connect electrical connectors.
– Install air intake box of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
136
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
WARNING
High voltage can cause fatal injury.
Danger of severe or fatal injuries from electric shock or elec‐
tric arcs.
– Have a high-voltage technician (HVT) or a high-voltage
expert (HVE) re-energise the high-voltage system.
– ⇒ Rep. gr. 93; Re-energising high-voltage system.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview - refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – heater and air condition‐
ing unit
♦ ⇒ Rep. gr. 87; Assembly overview – evaporator housing
♦ ⇒ General body repairs, interior; Rep. gr. 70; Central tube for
dash panel; Assembly overview – central tube for dash panel
7.6
Removing and installing heater and air
conditioning unit, R744
7.6.1
Removing and installing heater and air
conditioning unit
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-.
If heater and air conditioning unit, evaporator or heat condenser
has been 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.
DANGER
High voltage can cause fatal injury.
Danger of severe or fatal injuries from electric shock or elec‐
tric arcs.
– Have a high-voltage technician (HVT) or a high-voltage
expert (HVE) de-energise the high-voltage system.
– ⇒ Rep. gr. 93; De-energise high-voltage system.
– 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.
7. Front heater and air conditioning unit
137
2024 VW ID.4 Owner's Manual
