A/C - White Flakes Come From Dash Vents With Blower ON
TSB 09-12-1706/29/09
WHITE FLAKES COMING FROM A/C VENTS
FORD:
2002-2005 Crown Victoria
2005-2009 Focus
2000-2005 Expedition, F-150
2007-2009 Edge
2009 Escape Hybrid, Escape
LINCOLN:
2000-2002 Town Car
2000-2005 Navigator
2007-2009 MKX
MERCURY:
2002-2005 Grand Marquis
2009 Mariner Hybrid, Mariner
This article supersedes TSB 8-26-6 to update the vehicle lines.
ISSUE
Some vehicles may experience white flakes coming from the A/C vents when the blower motor is engaged. This may be caused by flux utilized in the manufacturing process of the evaporator core.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Using compressed air 90-150 PSI (620-1034 kPa), clean the A/C ducts through the registers and blow off the evaporator core through the blower motor opening.
NOTE
THE ENTIRE EVAPORATOR CORE SURFACE MUST BE DRY FOR BEST RESULTS.
NOTE
WHILE PERFORMING THIS PROCEDURE AND SELECTING DIFFERENT VENT MODES SUCH AS FLOOR / PANEL AND FLOOR / DEFROST, IT MAY BE NECESSARY TO TEMPORARILY START THE ENGINE TO ENABLE MODE DOOR MOVEMENT.
Clean A/C Ducts:
1. Remove floor duct trim.
2. Using masking tape, connect one end of the vacuum cleaner hose to the floor duct on driver side.
3. Tape closed all the other floor duct openings.
4. Obtain about two feet (61 cm) of rubber vacuum line large enough to fit the end of a small shop air blowgun. Secure the hose to the end of the blowgun using a worm clamp.
5. Close all instrument panel registers.
6. Set temperature setting to full cold.
7. Place mode in floor I panel.
8. Turn on vacuum cleaner.
9. Working with one register at a time insert the vacuum line down each duct and blow shop air through each duct for 30 seconds. Be sure to close each register before moving on to the next register.
10. Change mode to floor / defrost.
11. Blow down each defroster duct for 30 seconds.
12. Alternate mode door between floor and floor I defrost three (3) times, giving the door time to move between each change.
13. Turn off vacuum cleaner.
Clean Evaporator Core:
1. Change mode to full floor.
2. Ensure temperature is full cold.
3. Remove blower motor per Workshop Manual (WSM), Section 412.
4. Turn on vacuum cleaner.
5. Reach into blower opening with vacuum line and proceed to blow shop air for a minimum of 5 minutes, utilizing a very slow sweeping action.
6. Blow the entire core face in the up and down direction, then repeat moving from side to side.
NOTE
ATTENTION TO THE BLOW-OFF OF THE EVAPORATOR CORE SURFACE WILL DETERMINE EFFECTIVENESS OF REPAIR.
7. Install the blower motor per WSM, Section 412.
8. Open all registers.
9. Operate the system with A/C on and blower on Max in each mode setting with the temperature full cold and then full warm. Be sure to stay in each mode position for at least 30 seconds to ensure removal of any residual flakes / dust.
10. Disconnect vacuum cleaner and remove tape from floor duct.
11. Assemble floor duct trim.
12. Blow powder off or vacuum dash board and vehicle interior as required.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
091217A 2005-2009 Focus, 0.8 Hr.
2007-2009 Edge, MKX,
2009 Escape, Escape
Hybrid, Mariner, Mariner
Hybrid: Clean A/C Ducts
And Evaporator Core (Do
Not Use With Any Other
Labor Operations)
091217A 2002-2005 Crown Victoria, 0.9 Hr.
Grand Marquis, 2004-2005
F-iSO: Clean A/C Ducts
And Evaporator Core (Do
Not Use With Any Other
Labor Operations)
091217A 2000-2002 Town Car, 1.0 Hr.
2000-2005 Expedition,
Navigator, 2000-2003
F-150, Clean A/C Ducts
And Evaporator Core (Do
Not Use With Any Other
Labor Operations)
DEALER CODING
CONDITION
BASIC PART NO. CODE
19860 49
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