ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Check connection of refrigerant line -1- and refrigerant pres‐
sure and temperature sender 2 -G826- -4- for soiling, and
clean as necessary.
– Unscrew sender -4- using socket -T40284- while counter‐
holding at refrigerant line -1- with open-end spanner.
Installing
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Make sure that refrigerant lines are seated correctly, and
tighten refrigerant pressure and temperature sender 2 -
G826- while counterholding with open-end spanner.
– 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 – valve unit of heat pump
3.19
Removing and installing refrigerant
pressure and temperature sender 3
[G827]
3.19.1
Removing and installing refrigerant
pressure and temperature sender 3
G827
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
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.
40
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Remove underbody trim (front) ⇒ General body repairs, ex‐
terior; Rep. gr. 66; Underbody trim; Removing and installing
underbody trim (front).
– Mark electrical connector -1- to avoid interchange and un‐
plug it.
– Check connection of refrigerant line -5- and refrigerant pres‐
sure and temperature sender 3 -G827- -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.
– 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 refrigerant pressure and temperature sender 3 -
G827--2- while counterholding at refrigerant line 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 tight‐
en refrigerant pressure and temperature sender 3 -G827-;
counterhold 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
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
trim; Exploded view - underbody trim
3. Refrigerant circuit
41
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
3.20
Removing and installing refrigerant
pressure and temperature sender 4
[G828]
3.20.1
Removing and installing refrigerant
pressure and temperature sender 4
G828
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
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.
CAUTION
The cooling system may be under pressure. Risk of scalding
due to hot steam and hot coolant
Danger of scalding skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Cover filler cap on expansion tank with a suitable cloth and
open carefully to release pressure.
– Unfasten coolant expansion tank and move slightly to side
⇒ Rep. gr. 19; Cooling system/coolant; Removing and instal‐
ling coolant expansion tank.
– Mark electrical connector -5- to avoid interchange and un‐
plug it.
– Check connection of refrigerant line -1- and refrigerant pres‐
sure and temperature sender 4 -G828- -4- for dirt and clean
if necessary.
42
Rep. gr.87 - Air conditioning system
2024 VW ID.4 Owner's Manual
