Adapter For Assembling Flushing Circuit

The receiver/dryer may be attached to or integrated in the condenser on the Audi A1 / S1, depending on the version of the condenser. A dryer cartridge is installed in the integrated receiver/dryer and can be replaced separately. An attached receiver/dryer (introduction TBD) must be replaced after the flushing. Refer to the parts information and RECEIVER/DRYER, REMOVING AND INSTALLING (vehicle-specific repair information).

There are different versions of the A/C unit (different heater core and sears different expansion valve etc.) depending on time period of production and from the VIN number on Audi A1 / S1. Refer to the parts information. Vehicles with the type keys "8X1" and "8XA" in the VIN have an expansion valve installed, where both refrigerant lines are attached at the top. This is where the Refrigerant Circuits Adapter Set 1 - Adapter 34:VAS6338/34  fits. Vehicles with the type keys "8XF" and "8XK" in the VIN have an expansion valve installed, where both refrigerant lines are attached from below. This is where the Refrigerant Circuits Adapter Set 1 - Adapter 39:VAS6338/39  fits. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information).

The version of the receiver/dryer on the Audi A3, Audi Q3 and Audi TT will differ depending on the manufacturer of the condenser. An Audi TT (8J_) from MY 2007 with a 5-cylinder engine has a different condenser version than on models with a 4- or 6-cylinder engine. The receiver/dryer is, for example, inside the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. If there is a complaint regarding a vehicle with this condenser, it may be necessary to replace the entire condenser after correcting the complaint. Refer to the parts information and CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information).

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to DRYER BAG/DRYER CARTRIDGE, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

On the Audi A3 e-tron the refrigerant circuit is flushed in two sections. In the first flushing cycle, the adapter, which is installed for the Heater and A/C Unit Refrigerant Shut-Off Valve -N541-, is opened and the adapter, which is installed for the High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542- is closed. Thus the refrigerant circuit with the evaporator in the A/C unit is flushed. In the second flushing cycle, the adapter, which is installed for the Heater and A/C Unit Refrigerant Shut-Off Valve -N541-, is closed and the adapter, which is installed for the High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542- is opened. The refrigerant circuit with the evaporator in the high-voltage battery heat exchanger is flushed as a result. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information).

This illustration shows a refrigerant line -A- with a permanently installed restrictor -B- (without screen). This refrigerant line is drilled with a suitable drill 5.0 mm to flush the refrigerant circuit (an inserted restrictor is removed) and cleaned in the flushing circuit before installing. The refrigerant line or an inserted restrictor must be replaced after flushing. Refer to parts information.

Courtesy of AUDI OF AMERICA, LLC

The diameter of the illustrated restrictor hole -B- is approximately 0.7 mm. Depending on the version of the refrigerant line, this constriction is either permanently installed in the refrigerant line or is only inserted. A screen to separate floating deposits may be installed on the inserted version, which can block the restrictor hole.

The version of the receiver/dryer on the Audi A3 will differ depending on the manufacturer of the condenser. The receiver/dryer is, for example, inside the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. If there is a complaint regarding a vehicle with this condenser, it may be necessary to replace the entire condenser after correcting the complaint. Refer to the parts information and REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information).

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to DRYER BAG/DRYER CARTRIDGE, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

Depending on the condenser manufacturer, the receiver/dryer version for the Audi A4 (8K_) from MY 2008 varies. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information). The receiver/dryer may be attached to or integrated in the condenser, depending on the version of the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. In the event there is a complaint on a vehicle with this condenser, the condenser must be completely replaced. Refer to the parts information.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information) and the parts information.

Depending on the condenser manufacturer, the receiver/dryer version for these vehicles varies. Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information). The receiver/dryer may be attached to or integrated in the condenser, depending on the version of the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. In the event there is a complaint on a vehicle with this condenser, the condenser must be completely replaced. Refer to the parts information.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

In vehicles with two evaporators, the refrigerant circuit is flushed in two / three work steps.

Currently the expansion valves on the evaporator in the A/C unit and on the evaporator in the battery cooling module have the same connections (only the control characteristics and those on the Hybrid Battery Refrigerant Shut-Off Valve 2 -N517- are different).

The refrigerant circuit cannot be rinsed with a Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- installed in the circuit to the evaporator in the A/C unit. The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- is in a constricted location and prevents the refrigerant from reaching a sufficient flow speed. If a Shut-Off Valve:VAS6338/42  is available, install it for the Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- and open. If the Shut-Off Valves:VAS6338/42  are not available, but there are two A/C Adapter Set - Adapters 5:VAG 1785/5  , the circuit with the evaporator in the A/C unit can be flushed in one work procedure (reassemble the circuit with a filler hose and two A/C Adapter Set - Adapters 5:VAG 1785/5  ). If the Shut-Off Valve:VAS6338/42  is not available and there is only one A/C Adapter Set - Adapters 5:VAG 1785/5  available, the circuit must be flushed in two steps. From the low pressure connection on the A/C compressor via the evaporator in the A/C unit up to the connection for the removed Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- and from the connection for the removed Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- via the condenser to the high pressure connection on the A/C compressor.

The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- must be replaced after flushing. Refer to HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 1 -N516-, REMOVING AND INSTALLING (vehicle-specific repair information).

Depending on the condenser manufacturer, the receiver/dryer version for these vehicles varies. Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information). The receiver/dryer may be attached to or integrated in the condenser, depending on the version of the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. In the event there is a complaint on a vehicle with this condenser, the condenser must be completely replaced. Refer to the parts information.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to CONDENSER, REMOVING AND INSTALLING / DRYER BAG/DRYER CARTRIDGE, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

The specifications for the Audi A6 (4F_) from MY 2005 also apply to the Audi S6 and Audi RS 6.

The type designation 4X_ is used instead of the type designation 4G_ for specific versions in China

Depending on the condenser manufacturer, the receiver/dryer version for these vehicles varies. Refer to CONDENSER, REMOVING AND INSTALLING / REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information) and the parts information.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to DRYER BAG/DRYER CARTRIDGE, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

The type designation 4X_ is used instead of the type designation 4G_ for specific versions in China

For vehicles with two evaporators (one evaporator in the A/C unit and one evaporator in the battery cooling module or on the high-voltage battery heat exchanger, for example in the Audi A6 e-tron), the refrigerant circuit is flushed in two/three steps.

The expansion valve on the evaporator in the A/C unit and on the evaporator in the battery cooling module (Hybrid Battery Refrigerant Shut-Off Valve 2 -N517- on the A6 Hybrid or the expansion valve with the Refrigerant Shut-Off Valve 2 -N640- on the A6 e-tron) does not currently always have the same connections (when they have the same connections, they differ in the control characteristic). Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information).

The refrigerant circuit cannot be flushed with a shut-off valve installed in the circuit to the evaporator in the A/C unit (the Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- on an A6 Hybrid or the Refrigerant Shut-Off Valve -V424- on an A6 e-tron). The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- (the Refrigerant Shut-Off Valve -V424-) is a constriction and prevents the refrigerant from flowing at a suitable speed. If a Shut-Off Valve:VAS6338/42  is available, install it for the Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- (the Refrigerant Shut-Off Valve -V424-) and open. If the Shut-Off Valves:VAS6338/42  are not available, but there are two A/C Adapter Set - Adapters 5:VAG 1785/5  , the circuit with the evaporator in the A/C unit can be flushed in one work procedure (reassemble the circuit with a filler hose and two A/C Adapter Set - Adapters 5:VAG 1785/5  ). If the Shut-Off Valve:VAS6338/42  is not available and there is only one A/C Adapter Set - Adapters 5:VAG 1785/5  available, the circuit must be flushed in two steps. From the low pressure connection on the A/C compressor via the evaporator in the A/C unit up to the connection for the removed Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- (Refrigerant Shut-Off Valve -V424-) and from the connection for the removed Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- (Refrigerant Shut-Off Valve -V424-) via the condenser to the high pressure connection on the A/C compressor.

The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- (the Refrigerant Shut-Off Valve 1 -V424-) must be replaced after flushing. Refer to HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 1 -N516-, REMOVING AND INSTALLING (vehicle-specific repair information).

The receiver/dryer on the Audi A6 e-tron must be replaced after flushing. Refer to RECEIVER/DRYER, REMOVING AND INSTALLING .

Depending On The Condenser Manufacturer, The Receiver/Dryer Version For These Vehicles Varies. Refer To RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information). The receiver/dryer may be attached to or integrated in the condenser, depending on the version of the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. In the event there is a complaint on a vehicle with this condenser, the condenser must be completely replaced. Refer to the parts information.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

On the Audi A6 hybrid it can be helpful to remove both refrigerant lines in the engine compartment from the inner heat exchanger to flush the components in the battery cooling module and the related refrigerant lines. Then the adapters needed for flushing and the corresponding refrigerant hoses can be installed and removed more easily. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (vehicle-specific repair information).

On the Audi A6 hybrid, if the charge hose knurled nut cannot be screwed onto the connection (depending on the tolerance at the refrigerant pipe outlet at the connection) with an Refrigerant Circuits Adapter Set 1 - Adapter 3: VAS6338/3  attached to the refrigerant line for the evaporator in the battery cooling module, then carefully bend the refrigerant pipe approximately 1 mm to the side.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

In vehicles with two evaporators, the refrigerant circuit is flushed in two work steps.

Currently the front and rear expansion valves have the same connections (only the control characteristics are different)

In vehicles with two evaporators, the refrigerant circuit is flushed in two / three work steps.

Currently the expansion valve on the evaporator in the A/C unit and on the evaporator in the battery cooling module do not have the same connections.

The refrigerant circuit cannot be rinsed with a Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- installed in the circuit to the evaporator in the A/C unit. The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- is in a constricted location and prevents the refrigerant from reaching a sufficient flow speed. If a Shut-Off Valve:VAS6338/42  is available, install and open it for the Hybrid Battery Refrigerant Shut-Off Valve 1 -N516-. If the Shut-Off Valve:VAS6338/42  is not available, but there are two A/C Adapter Set - Adapters 5:VAG 1785/5  and the circuit with the evaporator in the A/C unit can be flushed in one work procedure (reassemble the circuit with a filler hose and two A/C Adapter Set - Adapters 5:VAG 1785/5  ). If the Shut-Off Valve:VAS6338/42  is not available and there is only one A/C Adapter Set - Adapters 5:VAG 1785/5  available, the circuit must be flushed in two steps. From the low pressure connection on the A/C compressor via the evaporator in the A/C unit up to the connection for the removed Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- and from the connection for the removed Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- via the condenser to the high pressure connection on the A/C compressor.

The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- must be replaced after flushing. Refer to HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 1 -N516-, REMOVING AND INSTALLING (vehicle-specific repair information).

Depending on the condenser manufacturer, the receiver/dryer version for these vehicles varies. Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information). The receiver/dryer may be attached to or integrated in the condenser, depending on the version of the condenser. The integrated receiver/dryer has a dryer cartridge that is no longer available as a replacement part. In the event there is a complaint on a vehicle with this condenser, the condenser must be completely replaced. Refer to the parts information.

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

In vehicles with two evaporators, the refrigerant circuit is flushed in two work steps.

On vehicles with two evaporators, the refrigerant circuit with the evaporator in the front of the A/C unit is flushed first. So that the refrigerant flows in a fixed direction when flushing, the refrigerant circuit to the second evaporator (in rear of A/C unit) must be blocked off. This is done by removing the expansion valve in the refrigerant lines to the second evaporator and installing the Refrigerant Circuits Adapter Set 1 - Adapter 43:VAS6338/43  (closed adapter). After the refrigerant circuit with the evaporator is flushed, switch both adapters Refrigerant Circuits Adapter Set 1 - Adapter 43 :VAS6338/43  and Refrigerant Circuits Adapter Set 1 - Adapter 44 :VAS6338/44  and flush the refrigerant circuit with the evaporator in the rear of the A/C unit.

In vehicles with two evaporators, the refrigerant circuit is flushed in two work steps.

In vehicles with two evaporators, the refrigerant circuit is flushed in two work steps.

On vehicles with two evaporators, the refrigerant circuit with the evaporator in the front of the A/C unit is flushed first. So that the refrigerant flows in a fixed direction when flushing, the refrigerant circuit to the second evaporator (in rear of A/C unit) must be blocked off. This is done by removing the expansion valve in the refrigerant lines to the second evaporator and installing the Refrigerant Circuits Adapter Set 1 - Adapter 43:VAS6338/43  (closed adapter). After the refrigerant circuit with the evaporator is flushed, switch both adapters Refrigerant Circuits Adapter Set 1 - Adapter 43 :VAS6338/43  and Refrigerant Circuits Adapter Set 1 - Adapter 44 :VAS6338/44  and flush the refrigerant circuit with the evaporator in the rear of the A/C unit.

On the Audi Q7 e-tron, the refrigerant circuit is flushed in four steps (flushing cycles). Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (A/C System Refrigerant Circuit, Cleaning).

So that the entire refrigerant circuit can be flushed, on the Audi Q7 e-tron not only the installed shut-off valve must be positioned correctly (opened or closed). Additionally the electric activated valves (in the valve block) must be positioned correctly. The activation of the electric valves takes place via different routines, which are stored in the respective control module (for example in the Thermal Management Control Module - J1024-). Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (A/C System Refrigerant Circuit, Cleaning).

To flush on the Audi Q7 e-tron the refrigerant circuit is divided into multiple sections and then cleaned respectively in a flushing cycle. The division takes place by activating the installed electrically activated valves and via the installed manually activated hand shut-off valves. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (A/C System Refrigerant Circuit, Cleaning) use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

The design of the different flushing circuits for the Audi Q7 e-tron is described in the vehicle-specific repair information. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a (A/C System Refrigerant Circuit, Cleaning).

Condensers with an integrated receiver/dryer or dryer cartridge that cannot be replaced separately or is not available as a replacement part, the condenser must be replaced after flushing (with the dryer cartridge installed). Refer to RECEIVER/DRYER, REMOVING AND INSTALLING / CONDENSER, REMOVING AND INSTALLING (vehicle-specific repair information) and the parts information.

After flushing, the refrigerant receiver on the heat exchanger for heat pump operation must be replaced. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a .

The Refrigerant Shut-Off Valve -V424- must be replaced after flushing. Refer to REFRIGERANT CUT-OFF VALVEREFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 1 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a .

The A/C compressor can only be removed when the engine is removed on the Audi R8. To flush the refrigerant circuit, the refrigerant lines can be removed when the A/C compressor is installed. Refer to A/C COMPRESSOR - 1 , A/C COMPRESSOR - 2 , COMPRESSOR, REPLACING WITHOUT THE NEED FOR FLUSHING REFRIGERANT CIRCUIT R134a , COMPRESSOR, REPLACING ON ACCOUNT OF LEAKAGE OR INTERNAL DAMAGE R134a , A/C COMPRESSOR, REPLACING WITHOUT THE NEED FOR FLUSHING REFRIGERANT CIRCUIT 1234yf (vehicle-specific repair information). With the A/C compressor installed the refrigerant oil quantity in the A/C compressor cannot be determined, for this reason flushing the refrigerant circuit with the A/C compressor installed would not be productive.

Both installed condensers are flushed in opposite direction of the refrigerant flow direction.

Depending on the engine, the A/C compressor can only be removed when the engine is removed on the Audi R8. To flush the refrigerant circuit, the refrigerant lines can be removed when the A/C compressor is installed. Refer to A/C COMPRESSOR - 1 , A/C COMPRESSOR - 2 , COMPRESSOR, REPLACING WITHOUT THE NEED FOR FLUSHING REFRIGERANT CIRCUIT R134a , COMPRESSOR, REPLACING ON ACCOUNT OF LEAKAGE OR INTERNAL DAMAGE R134a , A/C COMPRESSOR, REPLACING WITHOUT THE NEED FOR FLUSHING REFRIGERANT CIRCUIT 1234yf (vehicle-specific repair information). With the A/C compressor installed the refrigerant oil quantity in the A/C compressor cannot be determined, for this reason flushing the refrigerant circuit with the A/C compressor installed would not be productive.

Both installed condensers are flushed in opposite direction of the refrigerant flow direction.

A short version of the filler hose is also included in the Refrigerant Circuits Adapter Set 1:VAS6338/1  .

The receiver/dryer could potentially be flushed but it will take too much refrigerant because of its large internal volume; the receiver/dryer would ice-up too much when extracting the refrigerant, the refrigerant would evaporate too slowly and extraction would be prolonged too much.