Evaporator, Cleaning With Ultrasound A/C Cleaning System

Evaporator, Cleaning with Ultrasound A/C Cleaning System

Special tools, testers and auxiliary items required

• Ultrasound0 A/C Cleaner (VAS 6189A).

• Cleaning Fluid (VAS 6189/1)

• Numerous procedures varying in their application and effect are available on the market for cleaning the evaporator. Current Audi offers the (VAS 6189A) which has been approved and released for cleaning the evaporator.

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Preparation

- Check whether odor is actually in A/C evaporator by switching from fresh air to recirculation.

• The odor can only be removed by cleaning with the (VAS 6189A) if it originates in the evaporator.

- Check the plenum chamber and the water drain valves for dirt and debris and clean if necessary. Refer to => [ Plenum Chamber Water Drain ] Plenum Chamber Water Drain.

- Remove the dust and pollen filter and check for odors and dirt. Refer to => [ Dust and Pollen Filter ] Service and Repair.

• On this vehicle, the dust and pollen filter is installed between Fresh Air Blower (V2) and evaporator, therefore it must be removed for the cleaning.

- Clean the installation compartment of the A/C dust and pollen filter (remove leaves, dust and other contaminants). Refer to => [ Dust and Pollen Filter ] Service and Repair.

- Reseal opening on A/C unit through which dust and pollen filter was removed.

- Start the engine.

• It is sufficient to activate the ready mode on vehicles with the high voltage system (watch the display in the instrument cluster control module (J285) ). Refer to the Owner's Manual.

• The engine must not be running when the ready mode is activated on vehicles with the Start/Stop System. Refer to the Owner's Manual.

- On the Climatronic control module (J255) A/C display control head, set the "recirculation mode" and switch off the A/C compressor (the indicator lamp in the AC button does not illuminate).

- Open instrument panel vent and set the lowest temperature possible on the Climatronic control module ("Cold" temperature setting).

- Closes the windows and sunroof.

- Set Climatronic control module to lowest fresh air blow level and select "Instrument panel vent" for air flow direction.

Cleaning

- Shake the bottle of Cleaning Fluid (VAS 6189/1) and pour the contents into the (VAS 6189A) (when doing this, be sure to read the operation manual which comes with the (VAS 6189A) ).

- Place the (VAS 6189A) in the passenger's footwell.

- Start (VAS 6189A) (according to operating instructions) and route outlet hose belonging to it so vapor escaping via A/C unit recirculated air opening (in passenger footwell behind the glove compartment) is drawn in by fresh air blower.

- Close the vehicle doors.

• The cleaning process takes about 15 to 20 minutes. It is complete when vapor no longer comes out of outlet hose.

Finishing steps

- Switch off the (VAS 6189A).

- Open the vehicle doors and air out the passenger compartment for at least 10 minutes.

- Remove (VAS 6189A) from vehicle and clean it according to operating instructions.

- Turn off the ignition.

- Install the dust and pollen filter. Refer to => [ Dust and Pollen Filter ] Service and Repair.