Receiver/Dryer, Replacing Without The Need For Flushing Refrigerant Circuit

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

In the receiver/dryer usually there is a dryer cartridge or a desiccant bag are installed (depending on the design of the refrigerant circuit). Refer to Refrigerant Circuit and APPROVED REFRIGERANT OILS AND REFRIGERANT OIL CAPACITIES .

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

NOTE:

Cleaning the refrigerant circuit means flushing with refrigerant R1234yf. Refer to REFRIGERANT CIRCUIT, CLEANING .

For example, no escape of refrigerant and no ingress of moisture and dirt into circuit.
If it is determined at a gas analysis that contaminated refrigerant was in the circuit but there is no concern about the A/C system function. Refer to REFRIGERANT GAS ANALYSIS, PERFORMING .

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

-- Remove the receiver/dryer. Refer to Refrigerant Circuit .

-- Remove dirt from the receiver/dryer.

-- Weigh the removed receiver/dryer.

-- Add refrigerant oil to the new receiver/dryer until it is the same weight as the receiver/dryer that was removed.

-- Install the new receiver/dryer. Refer to Refrigerant Circuit .

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