ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
3.8
Removing and installing refrigerant
pressure and temperature sender
[G395], R744
3.8.1
Removing and installing refrigerant
pressure and temperature sender
G395
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-.
– 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.
– Unclip coolant hoses -1- and push them to side.
– Mark electrical connector -5- to avoid interchange and un‐
plug it.
– Check refrigerant line connection -1- and refrigerant pres‐
sure and temperature sender -G395- -4- for dirt and clean if
necessary.
3. Refrigerant circuit
27
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
2024 VW ID.4 Owner's Manual
