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 sender -4- using socket -T40284-; at the same time
counterhold at refrigerant line -1- using open-end spanner.
Installing
Installation is carried out in reverse order; note the following:
– Install seals, making sure they are free of oil.
– Check that refrigerant lines are seated correctly and tighten
refrigerant pressure and temperature sender -G395-; coun‐
terhold using open-end spanner while doing so.
– 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
3.9
Removing and installing pressure
sender for refrigerant circuit [G805],
R1234yf
3.9.1
Removing and installing pressure
sender for refrigerant circuit G805
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
♦ socket -T40284-
Removing
Seal off open pipes/lines and connections immediately with
clean plugs from engine bung set -VAS 6122-.
– Unfasten coolant expansion tank and move slightly to side
⇒ Rep. gr. 19; Cooling system/coolant; Removing and instal‐
ling coolant expansion tank.
– Unplug electrical connector -1-.
28
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Check connection of refrigerant line and pressure sender for
refrigerant circuit -G805- -2- for dirt and clean if necessary.
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.
– If refrigerant escapes from the refrigerant line for more
than 1 second when the pressure sender is unfastened,
tighten the pressure sender and renew the defective non-
return valve.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Unscrew sender -2- using socket -T40284-.
Installing
Installation is carried out in reverse order; note the following:
– Check that refrigerant line is seated correctly and tighten
pressure sender for refrigerant circuit -G805-.
Tightening torques
♦ ⇒ Rep. gr. 87; Exploded view - refrigerant lines
3.10
Removing and installing expansion
valve
3.10.1
Removing and installing expansion
valve
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-.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
– Detach refrigerant lines from expansion valve ⇒ Rep. gr. 87;
Detaching/attaching refrigerant line from/to expansion valve.
– Unscrew bolts -1- and -2-.
3. Refrigerant circuit
29
2024 VW ID.4 Owner's Manual
