A/C - Unpleasent Odors When In Use

BULLETIN NUMBER:
SB98-12-L001

ISSUE DATE:
OCTOBER 1998

GROUP:
AIR CONDITIONING

HVAC SYSTEM DEODORIZING TREATMENT

AFFECTED VEHICLES
All Isuzu light vehicles equipped with air conditioning.





PARTS INFORMATION

ISUZU WARRANTY CLAIM INFORMATION
Isuzu warranty does not cover this service.

GREEN ISLAND INC. WARRANTY INFORMATION
For inquiries regarding warranty information of Green Island Inc. products, please contact their customer support at 1-800-718-1131.


SERVICE INFORMATION

Condition:
Some Isuzu owners may experience unpleasant odors when using the ventilation system. These odors may be more pronounced shortly after engaging the HVAC system, 12 to 24 hours after previous use.

Possible Cause:
The above condition is typically caused by residual condensation in the evaporator case after A/C use. The odor can be aggravated by particulates such as: cigarette/cigar smoke, airborne molds, pollen, algae and bacteria trapped in the HVAC system which are continually recirculated.

Correction:
To minimize or eliminate unpleasant odors originating from the HVAC system, use available tool #J43681-4 (4-pack) or #J43681-12 (12-pack) to perform the procedure outlined in this bulletin.

1. Set the temperature selector to the warmest setting and select A/C off.

2. Dry the A/C evaporator by running hot air over the core with the mode control knob on recirculation mode for approximately five (5) minutes.
* On some models (without the manual A/C ON/OFF button), select "MAX A/C" mode with A/C fuse removed to disable the A/C compressor.

3. Remove the glove box while drying the A/C evaporator.





4. Drill 5/16" hole in the upper-right corner of the evaporator case. (Figure 1)

CAUTION
Be certain to set the drill bit depth at no more than 1/4". Mark the drill bit 1/4" or less from its tip as a guide. Extending the drill bit deeper into the case after the hole has been drilled will risk puncturing the evaporator core.





5. With the fan on medium to high speed and using the outside air setting, locate the deodorizer material (one can from # J43681-4 or J43681-12). Place the tip of the dispenser nozzle into the 5/16" drilled hole in casing, and flood the A/C evaporator core by discharging the entire contents (2.5 fluid ounces) of treatment chemical into the casing. (Figure 2)

NOTE: Some fluid may begin to stream out of the condensation drain. This is normal.

6. Plug the 5/16" hole with a 5/16" plug supplied with each can of treatment.
7. Run the ventilation system 5-10 minutes with the fan on high and windows open.
8. Reinstall the glove box and any panels, previously removed during Step 3.
* Reinstall the A/C fuse, if previously removed.

The application should last 3-4 months under normal use. Repeat the above service procedure, should odors return after such time.

NOTE
As a preventive measure, service personnels may also suggest to the customer to run the fan blower at mid to high speed with the A/C off to dry the evaporator for the last few minutes before turning off the vehicle.