Jeep WJ Grand Cherokee A/C Evaporator Odor Service

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Some automobile operators could expertise a musty odor from the A/C system, primarily at begin up in scorching and humid climates. This odor could also be the results of microbial progress on the evaporator core. During regular A/C system operation, condensation varieties in and across the A/C evaporator. When airborne pollution combine with this condensation, micro organism and fungi progress begins and odor outcomes.

NOTE: As of August 2005 this process has been up to date through  TSB # 24-013-05

Repair process

Parts required:  Mopar 04897625AA Cleaner, Aerosol Evaporator

 

NOTE: FOLLOW ALL CAUTIONS AND WARNING SUPPLIED WITH THE AEROSOL EVAPORATOR CLEANER; KEEP OUT OF REACH OF CHILDREN; AVOID CONTACT WITH SKIN OR EYES; WEAR SKIN AND EYE PROTECTION, IF SKIN OR EYE CONTACT OCCURS, WASH SKIN OR FLUSH EYES WITH GENEROUS AMOUNTS OF WATER; AVOID BREATHING VAPORS.

1. Inspect the evaporator and HVAC housing for leaves or different international materials that could be blocking the air circulate by way of the evaporator. If the construct up is extreme, substitute of the evaporator could also be required.

2. With the parking brake utilized and the transmission in Park, begin the engine and let idle. Put the temperature management to full scorching, blower pace to HIGH, choose the PANEL and RE-CIRCULATE modes. Open all home windows about 13mm (½ in.). Disable the A/C compressor clutch by disconnecting its wiring connector or the wiring connector to the A/C stress change.

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NOTE: THIS PROCEDURE HEATS THE EVAPORATOR AND CAUSES MOISTURE TO EVAPORATE FASTER. THE SLIGHTLY OPEN WINDOWS ALLOW MOISTURE TO ESCAPE THE VEHICLE WITHOUT LOOSING MUCH HEAT. SOMETIMES, YOU MAY SEE A “FOG” CLOUDING THE WINDOWS. AFTER THIS “FOG” HAS DISAPPEARED CONTINUE TO OPERATE THE HEATER FOR ANOTHER 5 MINUTES. IF THE “FOG” NEVER APPEARED, OPERATE THE HEATER FOR A MINIMUM OF 30 MINUTES.

3. Turn the ignition change to the OFF place.

4. Gain entry to the evaporator cavity to use the evaporator by eradicating the blower motor resistor (handbook A/C programs) or the blower motor controller (Automatic A/C programs). The resistor (or controller) is mounted to the HVAC housing, beneath the correct facet instrument panel and simply inboard of the blower motor. It could be accessed with out eradicating another parts.

 

 

A. Depress locking tab and unplug the wire harness connector from the blower motor resistor.B. Depress locking tab and unplug the resistor connector from the blower motor.

C. Remove the two screws that safe the blower motor resistor to the HVAC housing.

D. Remove the blower motor resistor from the HVAC housing.

Blower motor resistor/controller elimination

5. Place a chunk of heavy masking tape over the opening within the evaporator housing the place the blower resistor or controller was eliminated, then punch a small gap for the evaporator cleaner tube to be inserted into.

6. Shake evaporator cleaner aerosol can effectively and insert the appliance tube within the entry gap created in step 4.

 

NOTE: THE APPLICATION TUBE HAS A BLACK MARK AND A RED MARK ON IT INDICATING HOW FAR THE TUBE SHOULD BE INSERTED INTO THE EVAPORATOR CAVITY. THE BLACK MARK IS FOR GRAND CHEROKEE VEHICLES.
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7. Start the engine and let idle. Set the blower motor to HIGH.

8. Put on goggles and dirt masks kind respiratory safety.

9. Spray your entire contents of the evaporator cleaner into the evaporator cavity.

 

NOTE: A “FOG” MAY BE SEEN ENTERING THE PASSENGER COMPARTMENT WHILE THE EVAPORATOR CLEANER IS BEING SPRAYED. THE EVAPORATOR CLEANER WILL NOT STAIN OR HARM THE VEHICLE INTERIOR, BUT GOGGLES AND BREATHING PROTECTION MUST BE WORN DURING CLEANER APPLICATION. DO NOT BREATH VAPORS!

 

10. When the can is empty, flip the ignition change to the OFF place and let the automobile sit for 20 minutes. This time will enable the cleaner to circulate over and coat the evaporator fins and case meeting.

11. Re-install the blower motor resistor within the HVAC housing. The housing is listed to permit mounting in just one place. Tighten the mounting screws to 2.2 N·m (20 in. lbs.).

12. Open all the automobile home windows about 13mm (½ in.). Start the engine and let idle for a MINIMUM of half-hour with the temperature management to full scorching, blower pace to HIGH, PANEL and RE-CIRCULATE modes chosen. This will dry and treatment the evaporator cleaner onto the evaporator coil.

13. Connect the wiring disconnected in step 2 to re-enable the A/C compressor clutch.

14. Verify correct A/C operation.

15. Owners of automobiles that function in circumstances the place the air inlet to the hvac housing is topic to international materials, particles or different airborne contaminates, could wish to take into account having a mopar accent cabin air filter equipment put in. See Cabin Air Filter.

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