Riviera V6-231 3.8L VIN C SFI (1989)
Technical Service Bulletin # 9011A
Date: 891201
A/C - Odors at Start Up in Hot Humid Climates
Bulletin 90-1-1
Date Dec., '89
Ref. No.
90-025-1
Corp. Ref. No. 811204R
SUBJECT:
A/C ODOR (CLEANING PROCEDURE)
MODELS AFFECTED:
1988-90 SKYHAWK, SKYLARK AND REATTA, 1985-90 ELECTRA/PARK AVENUE AND LESABRE, AND
1986-90 RIVIERA
This bulletin has been revised to include 1990 Electra/Park Avenue, LeSabre, Riviera and the 1988-1990 Reatta, Skyhawk and Skylark. This revision
also adds Figure 5 to the Bulletin.
Some vehicles may experience odors emitted from the air conditioning system primarily at start up in hot, humid climates. This odor may be the result of
debris in the heater/evaporator case and/or microbial growth on the evaporator core. To repair this condition, the following equipment and procedure
should be used:
Required Equipment
^
GM Goodwrench air conditioning system disinfectant kit, part number 25533404
^
Kent-Moore tool J-36645 air conditioning system cleaning gun
^
Rubber gloves
^
Safety goggles (ordinary safety glasses are not sufficient)
^
Pedestal fan
^
Afterblow module, part number 25533406
Parts are currently available from GMSPO.
CAUTION:
This procedure should only be performed on a cold car. It has been demonstrated that irritating vapors will be formed in the engine
compartment if the disinfectant coming out of the drain outlet contacts hot engine components.
Disinfectant can cause substantial, but temporary, eye injury. Do not get in eyes or on clothing. Wash thoroughly with soap and water
after handling.
First Aid:
If disinfectant gets into eyes, hold eyelids open and flush with a steady, gentle stream of water for 15 minutes.
Obtain medical attention if irritation persists.
Procedure:
1.
Put on rubber gloves and safety goggles.
2.
Pour the small bottle of Goodwrench air conditioning system disinfectant kit, part number 25533404, into the large bottle. Seal and invert the large
container once or twice to mix contents.
3.
Raise vehicle and remove drain grommet on vehicles equipped with a sound barrier on the heater/evaporator module.
4.
Lower vehicle.
5.
Connect battery charger and charge during cleaning to avoid draining the battery.
6.
Remove power module/resistor block as described in the appropriate service information manual. Leaving wiring connectors attached to gain
access to the evaporator core face closest to the blower motor.
CAUTION: Power module/resistor block heat sink may be hot.
NOTICE:
Do not allow the metal heat sink of the power module or the metal coils of the blower resistor to become grounded to any metal
surface as this may result in internal circuitry damage.
