A/C Compressor Regulator Valve -N280-, Removing And Installing And Replacing: Removing

WARNING: This page does not describe the selected car, but rather 23 other vehicles, including the 2017 Audi S5, 2017 Audi A5 Quattro, 2016 Audi S5, 2016 Audi A5 Quattro, and 2015 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

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

CAUTION:

- Never start the engine with the refrigerant circuit empty.

-- Depending on the vehicle and component location of the A/C compressor, remove the components that prevent access to the A/C Compressor Regulator Valve -N280-. Refer to REFRIGERANT CIRCUIT - 1 , REFRIGERANT CIRCUIT - 2 , REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a , REFRIGERANT CIRCUIT R134a .

For Vehicles Where at Least One of the Two Refrigerant Lines and the A/C Compressor Regulator Valve -N280- Cannot Be Disconnected and Removed While the A/C Compressor Is Attached to the Engine.

-- Remove the A/C compressor. 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 .

For a Vehicle Where at Least One of the Two Refrigerant Lines and the A/C Compressor Regulator Valve -N280- Can Be Disconnected and Removed While the A/C Compressor Is Attached to the Engine (the A/C Compressor Is Not Removed).

-- Extract refrigerant.

CAUTION:

Danger Or Frostbite Due To Refrigerant Coming Out Under Pressure.

Frostbite On The Skin And Other Parts Of The Body Is Possible.

- Wear Safety Gloves.

- Wear Protective Eyewear.

- Extract refrigerant and open the refrigerant circuit immediately.

- If more than 10 minutes elapse after extracting the refrigerant and the refrigerant circuit was not opened, extract the refrigerant again. Pressure can develop in the refrigerant circuit due to evaporation.

-- Check the pressure in the refrigerant circuit once more via the A/C service station pressure gauge.

If the displayed pressure is larger than the ambient pressure (larger than approximately 1 bar (14.5 psi) absolute pressure), turn on the A/C service station and extract the refrigerant that is building up the pressure.

-- Disconnect one of the two refrigerant lines from the A/C compressor. 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 .

All Vehicles

NOTE:

This and the following images show the A/C Compressor Regulator Valve -N280- -B- on a "Sanden" A/C compressor type "6 SEU 14". On these A/C compressors the connector for the vehicle wiring harness connection is mounted directly on the A/C Compressor Regulator Valve -N280- -B-. The removal and installation of the A/C Compressor Regulator Valve -N280- -B- on other A/C compressors (other type and manufacturer, for example "Denso", the A/C Compressor Regulator Valve -N280- with a short wiring harness to the connector) can differ. The procedure is however the same, as described in the following for the A/C compressor manufactured by "Sanden" type "6 SEU 14".

Courtesy of AUDI OF AMERICA, LLC

-- If equipped, loosen the wire connection from the A/C Compressor Regulator Valve -N280- -B- to the connector to the vehicle wire harness from the A/C compressor.

NOTE:

For an A/C compressor with an A/C Clutch -N25-, where the actuation of the A/C Clutch -N25- occurs via the same connector as the actuation of the A/C Compressor Regulator Valve -N280- -B-, remove the corresponding wires from the connector. 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 .

-- Clean the A/C compressor in the area of the A/C Compressor Regulator Valve -N280- -B-.

-- Remove the circlip -A-.

-- Carefully pull the A/C Compressor Regulator Valve -N280- -B- from the mount for the A/C compressor -C-.

-- Check the removed A/C Compressor Regulator Valve -N280- -B- and A/C compressor mount -C- for dirt.

NOTE:

If the strainer -D- on the A/C Compressor Regulator Valve -N280- -B- or the A/C compressor mount -C- are heavily contaminated (for example with shavings or dark, sticky abraded material), this indicates damage on the A/C compressor. In this case, the refrigerant circuit is to be cleaned and the A/C compressor is to be replaced. Refer to COMPRESSOR, REPLACING ON ACCOUNT OF LEAKAGE OR INTERNAL DAMAGE and REFRIGERANT CIRCUIT, CLEANING .

If the strainer -D- on the A/C Compressor Regulator Valve -N280- -B- and the A/C compressor mount -C- are only lightly contaminated (with gray deposits from normal A/C compressor operation, for example), a malfunction at the A/C Compressor Regulator Valve -N280- -B- can cause the A/C compressor malfunctioning.