Beretta L4-121 2.0L (1987)
Evaporator Drain Tube: Customer Interest
A/C - Odor
Number:
88-218-1B
Section:
1B
Date:
MAY, 1988
Subject:
A/C ODOR
Model and Year:
1985-88 CHEVROLET MODELS WITH AIR CONDITIONING
TO:
ALL CHEVROLET DEALERS
Some customers 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 or microbial growth on the evaporator core. To repair this condition, the following equipment and procedure
should be utilized:
Required Equipment:
^
GM Goodwrench air conditioning system disinfectant kit, P/N 25533404
^
Kent-Moore tool number J-36645 or equivalent Air Conditioning Cleaning Gun
^
Rubber gloves
^
Safety goggles or face shield (ordinary safety glasses are not sufficient)
^
NIOSH-approved acid gas/organic vapor respirator with chlorine dioxide cartridges, 3M P/N C1842 or equivalent.
CAUTION:
Procedure should only be performed on a cold car to prevent the disinfectant from coming in contact with 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 disinfectant.
FIRST AID:
If disinfectant gets into eyes, hold eyelids open and flush with a steady, gentle stream of water for fifteen minutes. Obtain medical attention if irritation
persists.
Procedure:
1.
Put on rubber gloves, safety goggles, and NIOSH-approved respirator.
2.
Pour the small bottle of the two-part GM Goodwrench air conditioning system disinfectant kit, P/N 25533404, into the large bottle. Seal and invert
the large container once or twice to mix contents.
3.
Connect battery charger to avoid draining the battery during cleaning procedure.
4.
Check underneath vehicle to verify that drain outlet is not plugged.
5.
Remove blower resistor as described in service manual, leaving wiring connectors attached.
WARNING:
Do not allow the metal coils of the blower resistor to become grounded to any metal surface as this may result in internal circuitry
damage.
CAUTION: Blower resistor may be hot.
6.
Check heater/evaporator case for debris. Remove any debris present through blower resistor opening. If debris is imbedded into the evaporator
core face and cannot be removed, the core will have to be removed from the vehicle and cleaned. If a large amount of debris is present in the
heater/evaporator case the air inlet screen will require sealing around the air intake in the cowl area.
7.
Turn the ignition to the "ON" position but do not start vehicle.
8.
Set mode selector to vent, blower switch to low speed and temperature lever to full cold.
9.
Open all windows and doors. Exit vehicle.
