A/C Compressor, Replacing Due To Leaking Or Internal Damage

WARNING: This page is about a different car, the 2022 Volkswagen ID.4 and 2021 Volkswagen ID.4. However, it is still accessible from the selected car via links, so may be relevant.

Pay attention to the general information for replacing components. Refer to GENERAL INFORMATION FOR REPLACING COMPONENTS .

Vehicles with a High-Voltage System (Hybrid Vehicles)

-- Pay attention to the high-voltage system danger classification. Refer to [For engine(s) EBRA] High-Voltage System Danger Classification .

-- Observe the safety precautions when working on the high-voltage system. Refer to SAFETY PRECAUTIONS WHEN WORKING ON VEHICLES WITH HIGH-VOLTAGE SYSTEM .

-- Pay attention to safety precautions when working near high-voltage components. Refer to SAFETY PRECAUTIONS WHEN WORKING NEAR HIGH-VOLTAGE COMPONENTS .

All Vehicles

Replacing the A/C compressor for example due to noises from the A/C compressor or no A/C compressor output.

-- Discharge the refrigerant circuit. Refer to WORKING WITH A/C SERVICE STATION .

-- Remove the A/C compressor. Refer to A/C Compressor .

-- Clean the refrigerant circuit (flush with refrigerant R1234yf). Refer to REFRIGERANT CIRCUIT, CLEANING .

NOTE:

If there is internal damage (to the A/C compressor), check the refrigerant hoses and condenser. If small fragments have gotten in, for example, clean the refrigerant hoses and gas cooler (condenser) (refer to REFRIGERANT CIRCUIT, CLEANING to flush with refrigerant R134yf) and replace the refrigerant hoses if necessary.

On certain vehicles (vehicles with two evaporators, for example), the amount of refrigerant oil in the refrigerant circuit may be greater than the amount that is in the replacement A/C compressor. If necessary, add the remaining amount of refrigerant oil to the refrigerant circuit on these vehicles. Refer to Technical Data (vehicle-specific Service Information).

Do not flush the refrigerant circuit if there is a fault in the electronics in the electronically driven A/C compressor (for example the A/C Compressor Control Module -J842- is defective). In this case, replace the A/C compressor without cleaning the refrigerant circuit. Refer to A/C COMPRESSOR, REPLACING WITHOUT NEEDING TO CLEAN REFRIGERANT CIRCUIT .

-- Replace the desiccant bag/dryer cartridge (reservoir/receiver/dryer). Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT, R1234YF .

-- Replace the expansion valve. Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT, R1234YF .

-- Assemble, evacuate and fill the refrigerant circuit. Refer to WORKING WITH A/C SERVICE STATION .