| SUBJECT: A/C Evaporator Odor |
| NO: 240894 |
| GROUP: Heater & A/C |
| DATE: May 6, 1994 |
| MODELS: 1993 1994 (AN) Dakota 1993 1994 (AS) Caravan/Grand Caravan/Caravan CV Voyager/Grand Voyager/Town & Country 1994 (BR) Ram Truck 1993 1994 (LH) Concorde/Intrepid/Vision/New Yorker/LHS 1995 (PL) Neon 1993 1994 (ZJ) Grand Cherokee/Grand Wagoneer |
| SYMPTOM/CONDITION: An offensive "musty" odor may be emitted from the A/C ducts. The odor is most noticeable when the A/C system is first turned on, and after the A/C system has been left off overnight or longer. The odor results from foreign material accumulating in the evaporator. |
| DIAGNOSIS: The odor may only be present after the system has been left off overnight or longer. Operate the system. If the odor is present, perform the repair procedure. |
| PARTS REQUIRED: 1 4728942 A/C evaporator cleaner 1 4740319 Reusable Nozzle Rubber Gloves Safety Glasses |
| REPAIR PROCEDURE: This bulletin involves cleaning and disinfecting the A/C evaporator and housing. NOTE: FOLLOW ALL CAUTIONS AND WARNINGS SUPPLIES WITH THE A/C EVAPORATOR CLEANER - WEAR SAFETY GLASSES AND ROBBER GLOVES AVOID BREATHING VAPORS USE WATER TO FLUSH EYES IF NECESSARY 1. Verify that the A/C drain tube is free from foreign material and drains freely. 2. Protect the seats and interior of the vehicle with a drop cloth. 3. Start the engine, set the blower on HIGH, air on RECIRCULATE, turn the A/C compressor OFF, open all of the instrument panel vents and windows. Run the vehicle for 60 minutes to dry the evaporator. 4. Switch the system to outside air. With a shop rag block off 90% of the outside air inlets to increase air velocity (the outside air inlets are outside the vehicle in the cowl area). 5. Remove the wiper arms and cowl screen. 6 Shake the bottle of evaporator cleaner. Install the applicator to the cleaner bottle and connect an air supply with a minimum of 80 PSI to the applicator. 7. Spray the cleaner directly into the air inlet (as close to the air supply hole in the cowl sheet metal as possible) for 20 seconds or until the bottle is empty. 8. Wipe off any access cleaner from around the instrument panel vents. 9. Set the blower on High, air on RECIRCULATE, and the compressor OFF. Run the system for 20 minutes to dry the evaporator again. 10. Install the cowl screen and wiper arms. |
| POLICY: Reimbursable within the provisions of the warranty. |