Evaporator, Cleaning With Ultrasound A/C Cleaner

Evaporator, Cleaning with Ultrasound A/C Cleaner

Tools required

• Ultrasound A/C Cleaner (VAS 6189).

• Cleaning Fluid (VAS 6189/1)

• There are many different methods for cleaning the evaporator offered on the market. Currently Audi offers the (VAS 6189) which has been approved and released for cleaning the evaporator.

• Odors from the air conditioning system can be caused by various things, only a portion of these orders come from the evaporator and can be corrected by cleaning it with, for example, the (VAS 6189).

Causes of Odor, refer to => [ Causes of Odor ] Causes of Odor.

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 6189) if it originates in the evaporator.

- Check plenum chamber and water drain valves installed there and clean them if necessary. Refer to => [ Plenum Chamber Water Drain, Checking and Cleaning ] Service and Repair.

- Remove dust and pollen filter and check it for odor and contamination. 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 for dust and pollen filter of heating and A/C unit of 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.

- Adjust the Climatronic control module (J255) to "recirculation mode", and switch the A/C compressor off (the indicator lamp in the AC is off).

- Open instrument panel vents and set the lowest temperature possible on the Climatronic control module (J255) ("Cold" temperature setting).

- Close the windows and the 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 (VAS 6189/1) and then fill the (VAS 6189). Be sure to read the Operating Instructions that come with the (VAS 6189).

- Place (VAS 6189) in passenger side footwell.

- Start (VAS 6189) (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 glove compartment) is drawn in by Fresh Air Blower (V2).

- Close 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 (VAS 6189) off.

- Open vehicle doors and air out vehicle at least 10 minutes.

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

- Switch off ignition.

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