Air Conditioning System Musty Odor (M64 01 06)

AIR CONDITIONING SYSTEM MUSTY ODOR

TECHNICAL SERVICE BULLETIN

SUBJECT

Air Conditioning System Musty Odor 

SITUATION

The customer may complain of a musty odor that is coming from the heating and air conditioning system.

CAUSE

Certain environmental conditions may cause a musty odor when the air conditioning system is used.

PROCEDURE

Clean the heating and air conditioning system using the Wynn's Aircomatic Cleaning tool. Refer to The Equipment Program for information on how to purchase the tool along with the cleaning fluid at 1-888-222-7997.

The following items are needed to complete the cleaning procedure:

1. Wynn's Aircomatic Ultrasonic Cleaner
Fig 1: Wynn's Aircomatic Ultrasonic Cleaner

2. Wynn's Airco clean.

Some of the advantages of this new tool are as follows:

• No drilling or disassembly of the vehicle is necessary
• Ease of use, tool can be started and then left unattended to finish the cleaning.
• The cleaning procedure is very effective for not only cleaning the evaporator but can rid the interior of the vehicle of certain odors.

Before the cleaning procedure is carried out the following points should be taken into consideration:

• Always inspect the microfilters and replace as necessary.
• Inspect the microfilter housing and drains for clogging and clean as necessary.
• Make sure the evaporator housing drains are not clogged.
• Always verify the customer complaint. Sometimes the vehicle interior carpet may be soaked because of a water leak. Also inspect the trunk for water leaks or items that may cause a smell.

SAFETY PRECAUTIONS

Always wear proper eye protection. The use of safety goggles or glasses, gloves and a shop coat is recommended.

Make sure the vehicle is in Park/Neutral and the parking brake is set before any work is performed.

Before starting the engine, check to be sure that the vehicle's fan blades, pulleys, belt and other moving parts are clear of any obstructions.

AIRCO-CLEAN A/C TREATMENT APPLICATION

1. Start the engine.
2. Turn the air conditioning off.
3. Set the blower speed to low.
4. Set the temperature setting to 71°F (22°C) for IHKA and middle temperature position for IHKS.
5. Set the ventilation system to recirculation.
6. Set air flow to the center dash vents only.
7. Before using the Wynn's Aircomatic Cleaner, ensure that there is no remaining liquid from a previous treatment.
8. Empty a bottle of Airco-Clean into the filling chamber of the Wynn's Aircomatic Cleaner.
9. Connect the outlet tube to the Wynn's Aircomatic Cleaner.
10. Place the Wynn's Aircomatic Cleaner horizontally upright in the passenger-side foot-well area.
11. Open the passenger front window slightly (all other windows are fully closed) and run the power chord through the opening, taking care not to pinch the power chord.
12. Connect the power chord to an outlet.
13. Position the outlet tube of the Wynn's Aircomatic Cleaner under dash area (ventilation system inlet).
14. Push the "Start" button, get out of the vehicle and close all the doors. Vapor comes out of the center dash vents after 20-30 seconds.
15. The machine automatically switches off:
    • At the end of the treatment time (approximately 20 minutes)
    • At minimum fluid level.
16. Disconnect power source and dispose of the residue fluid.
17. Open all doors and put blower motor on high speed for 5 minutes to air out vehicle.

Please refer to the "Manual" supplied with the Wynn's Aircomatic Cleaner for further information.

WARRANTY INFORMATION

Not covered under warranty.