Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSVOLKSWAGEN2022ID.4 PRO, AWDREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING87 AIR CONDITIONINGREFRIGERANT CIRCUITSYSTEM OVERVIEW - REFRIGERANT CIRCUIT, R744SYSTEM OVERVIEW - REFRIGERANT CIRCUIT

2022 Volkswagen ID.4 Pro, AWD

System Overview - Refrigerant Circuit

2022 Volkswagen ID.4 Pro, AWDSECTION System Overview - Refrigerant Circuit

GWWA87-13189

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Gas Cooler
- Refer to Gas Cooler, Removing and Installing. .
Refrigerant Shut-Off Valve 1 -N696-
- Refer to Refrigerant Shut-Off Valve 1 N696, Removing and Installing .
High-Voltage Battery Coolant Circuit, Incorporating
- Refer to CONNECTION DIAGRAM - COOLANT HOSES, REFRIGERANT R1234YF / CONNECTION DIAGRAM - COOLANT HOSES, REFRIGERANT R744 .
High-Voltage Battery Heat Exchanger
- Refer to HIGH-VOLTAGE BATTERY HEAT EXCHANGER, REMOVING AND INSTALLING, R1234YF / HIGH-VOLTAGE BATTERY HEAT EXCHANGER, REMOVING AND INSTALLING, R744 .
Low Pressure Side Service Connection
- Refer to EVACUATING AND CHARGING VALVE, LOW AND HIGH PRESSURE SIDE, REMOVING AND INSTALLING, R1234YF / EVACUATING AND CHARGING VALVE, LOW AND HIGH PRESSURE SIDE, REMOVING AND INSTALLING, R744 .
High Pressure Side Service Connection
- Refer to EVACUATING AND CHARGING VALVE, LOW AND HIGH PRESSURE SIDE, REMOVING AND INSTALLING, R1234YF / EVACUATING AND CHARGING VALVE, LOW AND HIGH PRESSURE SIDE, REMOVING AND INSTALLING, R744 .
Refrigerant Expansion Valve 2 -N637-
- Refer to Refrigerant Expansion Valve 2 N637, Removing and Installing .
Refrigerant Expansion Valve 3 -N638-
- Refer to Refrigerant Expansion Valve 3 N638, Removing and Installing .
A/C Pressure/Temperature Sensor 4 -G828-
- Refer to A/C Pressure/Temperature Sensor 4 G828, Removing and Installing .
Heat Condenser
- Refer to Heat Condenser, Removing and Installing .
Refrigerant Expansion Valve 1 -N636-
- Refer to Refrigerant Expansion Valve 1 -N636-, Removing and Installing .
Evaporator
- Refer to EVAPORATOR, REMOVING AND INSTALLING, R1234YF / EVAPORATOR, REMOVING AND INSTALLING, R744 .
Refrigerant Shut-Off Valve 4 -N642-
- Refer to Refrigerant Shut-Off Valve 4 -N642-, Removing and Installing .
A/C Pressure/Temperature Sensor 2 -G826-
- Refer to A/C Pressure/Temperature Sensor 2 G826, Removing and Installing .
Refrigerant Shut-Off Valve 3 -N641-
- Refer to Refrigerant Shut-Off Valve 3 -N641-, Removing and Installing .
Dryer with Inner Heat Exchanger
- Refer to Dryer, Removing and Installing .
A/C Pressure/Temperature Sensor 5 -G829-
- Refer to A/C Pressure/Temperature Sensor 5 G829, Removing and Installing .
A/C Compressor -VX81-
- Refer to A/C COMPRESSOR -VX81-, REMOVING AND INSTALLING, R1234YF / A/C COMPRESSOR -VX81-, REMOVING AND INSTALLING, R744 .
A/C Pressure/Temperature Sensor -G395-
- Refer to A/C PRESSURE/TEMPERATURE SENSOR -G395-, REMOVING AND INSTALLING, R1234YF / A/C PRESSURE/TEMPERATURE SENSOR G395, REMOVING AND INSTALLING, R744 .
Refrigerant Shut-Off Valve 2 -N640-
- Refer to Refrigerant Shut-Off Valve 2 -N640-, Removing and Installing .
Refrigerant Shut-Off Valve 5 -N643-
- Refer to Refrigerant Shut-Off Valve 5 -N643-, Removing and Installing .
A/C Pressure/Temperature Sensor 3 -G827-
- Refer to A/C PRESSURE/TEMPERATURE SENSOR 3 G827, REMOVING AND INSTALLING .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.