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 MANUALSVOLKSWAGEN2020GOLF AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING (REFRIGERANT R1234YF SERVICING) (1 OF 2)
2020 Volkswagen Golf Automatic Trans
Air Conditioning (Refrigerant R1234YF Servicing) (1 Of 2)
2020 Volkswagen Golf Automatic TransSECTION Air Conditioning (Refrigerant R1234YF Servicing) (1 Of 2)
- 87 Air Conditioning
- Refrigerant Circuit
- System Overview - Refrigerant Circuit
- General Description - Refrigerant Circuit Components
- Refrigerant Circuit Layout And Function
- Mechanically Driven A/C Compressor
- Electrically-Driven A/C Compressor For Hybrid Vehicles
- Condenser
- Evaporator
- Reservoir
- Heat Pump Operation Heater Core
- Fluid Collector
- RESTRICTOR
- Receiver/Dryer
- Expansion Valve With And Without Shut-Off Valve
- Refrigerant Shut-Off Valves
- Refrigerant Line With Inner Heat EXCHANGER
- Quick-Release Coupling Connections On Refrigerant Lines
- Seals
- Refrigerant Circuit Pipes And Hoses
- Pressure Relief Valve
- Check Valve
- Quick-Release Coupling Connections On Refrigerant Circuit
- Refrigerant Circuit Connections With Valve For Switches
- Pressure Sensor And Switch On Refrigerant Circuit
- A/C Pressure/Temperature Sensor
- A/C Compressor Regulator Valve -N280-
- Refrigerant Temperature Sensor
- Possible Concerns
- Leaks, Finding
- General Information For Finding Leaks On The Refrigerant Circuit
- Refrigerant Circuit, Finding Leaks Using Electronic Leak Detector
- Leaks, Finding With UV Leak Detection System (Not Applicable For CANADA)
- FINDING LEAKS VIA VACUUM TEST USING A/C Service Station OR WITH PRESSURE TEST
- Leaks, Determining With A Pressure Test, With Nitrogen Or Compressed Air
- Components, Replacing
- General Information For Replacing Components
- Leaking Or Damaged Areas, Replacing, Empty Refrigerant Circuit Except A/C Compressor And Receiver/Dryer
- Leaking Or Damaged Areas, Replacing, Full Refrigerant Circuit Except A/C Compressor And Receiver/Dryer
- A/C Compressor, Replacing Without Needing To Clean Refrigerant Circuit
- Compressor, Replacing On Account Of Leakage Or Internal Damage
- Dryer Cartridge/Receiver/Dryer. Replacing After Cleaning Refrigerant Circuit
- Receiver/Dryer, Replacing Without The Need For Flushing Refrigerant Circuit
- Dryer Cartridge And Desiccant Bag, Replacing Without The Need For Flushing Refrigerant Circuit
- Refrigerant Circuit, Cleaning
- Notes
- General Information For Flushing Refrigerant Circuit
- Cleaning The Refrigerant Circuit, Preliminary Work (Flushing With Refrigerant R1234YF)
- Refrigerant Circuit, Cleaning Process
- Connection Diagram For Cleaning (Flushing), Refrigerant Circuit With Expansion Valve And Receiver/Dryer
- Connection Diagram For Cleaning (Flushing), Refrigerant Circuit With RESTRICTOR And Container (Without High-Voltage System)
- Adapter For Assembling Flushing Circuit
- General Information For Blow Through With Compressed Air Or Nitrogen
- Refrigerant Circuit, Flushing With Compressed Air Or Nitrogen
- Pressure, Checking With Pressure Gauge
- Working With A/C Service Station
- Working With A/C Service Station
- A/C Service Station On Refrigerant Circuit, Connecting
- Refrigerant Gas Analysis, Performing
- Refrigerant Circuit, Discharging
- Refrigerant Circuit, Evacuating
- Refrigerant Circuit, Charging
- A/C System, Operating After Charging
- A/C Service Station, Switching Off And Disconnecting From Refrigerant Circuit
- Refrigerant, Filling In Reservoir
- A/C Service Station, Discharging
- Electrically Driven A/C Compressor, Cleaning
- Refrigerant Circuit
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.