Beretta L4-121 2.0L (1987)
Technical Service Bulletin # 902411B
Date: 900501
A/C - Odor Treatment Procedure
Number:
90-241 -1 B
Section:
1B
Date:
May 1990 Corp. Bulletin No.: 031202
Subject:
AIR CONDITIONING ODOR
Model and Year:
1987-90 A, L CARS
Some of the above 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 address this odor condition, the following
equipment and procedure should be used.
Required Equipment
GM Goodwrench air conditioning system disinfectant kit, P/N 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, P/N 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. SAFETY GLASSES MUST BE WORN, 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 steady stream of water for 15 minutes. Obtain medical aftention if
irritation persists.
Procedure:
1.
Put on rubber gloves and safety goggles.
2.
Pour the small bottle of the air conditioning system disinfectant kit, P/N 25533404 into the large bottle. Seal and invert the large container once or
twice to mix the contents.
3.
Connect battery charger to the battery and charge, during cleaning process, to avoid draining the battery.
4.
Remove the power module/resistor block as described in the appropriate Service Manual to access the evaporator core face closest to the blower.
Do not disconnect the wiring connector.
CAUTION:
POWER MODULE HEAT SINK OR RESISTOR BLOCK MAY BE HOT.
NOTICE:
DO NOT ALLOW THE METAL HEAT SINK OF THE POWER MODULE OR THE COILS OF THE RESISTOR TO BE
GROUNDED TO ANY METAL SURFACE AS THIS MAY RESULT IN INTERNAL CIRCUITRY DAMAGE.
