A/C - White Dust Blows From Vents With A/C ON
10-023June 2, 2010
Applies To:
See VEHICLES AFFECTED
White Dust Comes From the HVAC Vents During A/C Use
SYMPTOM
When you turn the NC on, white dust comes out of the HVAC vents.
PROBABLE CAUSE
The interior coating of the evaporator is coming apart because too much coating was applied by the evaporator manufacturer.
VEHICLES AFFECTED
CORRECTIVE ACTION
Replace the evaporator core.
NOTE:
The repair information in this service bulletin is intended for Honda technicians who, at a minimum, have completed the first 10 Honda A/C technical training courses, including A/C Pressure/Temperature Diagnosis.
PARTS INFORMATION
Evaporator Core: P/N 80211-TA0-A01
0-Ring, 5/8-inch: P/N 80871-SN7-003
0-Ring, 8 mm: P/N 80873-5T7-000
TOOL INFORMATION
KTC Trim Tool Set: T/N SOJATP2014
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Failed Part: P/N 80211-TA0-A01
Defect Code: 08103
Symptom Code: 03214
Skill Level: Repair Technician
DIAGNOSIS
Turn on the A/C, press the MAX A/C button, and set the fan speed on High:
^ If you see white dust coming from the vents, go to REPAIR PROCEDURE.
^ If you do not see white dust coming from the vents, this service bulletin does not apply.
REPAIR PROCEDURE
NOTE:
This procedure is in an outline form that you can also use as a checklist for the repair. If you need more details, bookmark the following procedures in the 2008-2010 Accord Service Manual, or view them online:
^ Refrigerant Recovery
^ Blower Unit Removal/Installation
^ Center Console Panel Removal/Installation
^ Rear Heater-A/C Unit Component Replacement
^ System Evacuation
^ A/C Refrigerant Oil Replacement
^ System Charging
^ Refrigerant Leak Test
^ A/C System Test
1. Start the engine, and let it idle for 5 minutes with the A/C on.
2. Turn the ignition switch to LOCK (0), then use a Recovery/Recycling/Recharging station (Robinair R0B34788 or equivalent) to recover the refrigerant from the A/C system.
3. Remove the bolt from the A/C line clamp.
4. Remove the A/C line bolt, then disconnect the A/C line (A) from the evaporator core.
5. Remove the blower unit.
6. Remove the center console panel.
7. Disconnect the evaporator temperature sensor connector, the power transistor connector, and the passenger's air mix control motor connector (with climate control).
8. Remove the connector clip and the harness clip. Remove the self-tapping screws, the expansion valve cover, and the seal.
9. Pull out the evaporator core.
10. Remove the clips and the evaporator temperature sensor from the original evaporator core.
NOTE:
At the factory, the evaporator temperature sensor is installed at the 13th row of fins from the right side.
11. Install the evaporator temperature sensor and its clips onto the new evaporator core in the same location.
12. Carefully install the new evaporator core, making sure not to bend any of its lines.
13. Reinstall the seal, the expansion valve cover, and the self-tapping screws. Then reinstall the harness clip and the connector clip.
14. Reconnect the passenger's air mix control motor connector (with climate control), the power transistor connector, and the evaporator temperature sensor connector.
15. Replace any damaged clips on the center console panel, then reinstall the panel. Make sure all of the connectors and the clips are secured.
16. Reinstall the blower unit:
^ Torque the mounting nuts to 9.8 N.m (7.2 lb-ft).
^ Make sure there are no air leaks.
17. Lubricate the new 5/8-inch and 8 mm 0-rings with refrigerant oil, then install the 0-rings on the end of the NC line. Reinstall the A/C line on the evaporator core, then torque the A/C line bolt to 9.8 N.m (7.2 lb-ft).
18. Reinstall the A/C line clamp. Torque the line clamp bolt to 9.8 N.m (7.2 lb-ft).
19. Recharge the NC system with the recovery/recycling/recharging station. Recharging includes these substeps:
^ Evacuate the system.
^ Add 35 mL [1-1/5 oz] of DENSO ND-OIL 8 for the new evaporator core.
^ Add 400 to 450 g of refrigerant.
^ Check for refrigerant leaks.
^ Check the A/C performance.
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