A/C - Whistle Noise From Blend Door Area
Article No.03-7-4
04/14/03
^ CLIMATE CONTROL - WHISTLE NOISE FROM
BLEND DOOR SHAFT AREA - VEHICLES EQUIPPED
WITH MANUAL CLIMATE CONTROL PRODUCED
BEFORE 8/29/2002 ONLY
^ NOISE - WHISTLE NOISE FROM BLEND DOOR
SHAFT AREA - VEHICLES EQUIPPED WITH
MANUAL CLIMATE CONTROL PRODUCED BEFORE
8/29/2002 ONLY
FORD:
2002 EXPLORER
MERCURY:
2002 MOUNTAINEER
ISSUE
Some 2002 4 door Explorer/Mountaineer vehicles built prior to 8/29/2002 equipped with manual climate control may exhibit a whistle noise coming from inside the heater case. This may be caused by a gap between the actuator and the heater case which in turn allows air to escape past the blend door shaft when it is in certain positions. The noise may get louder when moving the temperature selection dial from hot to cold or vice versa.
ACTION
To verify that the whistle noise is related to the Blend Door Actuator, cycle the vehicle's temperature control dial back and forth from full hot to full cold and cycle the blower speed fan from low to high several times. At the same time listen for noises around the actuator assembly. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
NOTE
IF ADDITIONAL INFORMATION IS NECESSARY FOR ACTUATOR REMOVAL, REFER TO SECTION 412-00 CLIMATE CONTROL SYSTEM FOR MORE ASSISTANCE.
To service, remove the blend door actuator and install F57Z-19A672-CA Foam Seal per these steps:
1. Remove the floor console. For additional information, refer to Section 501-12.
2. Remove the lower steering column opening finish panel by removing the screws and disengaging the retaining clips.
3. Remove the LH center instrument panel support brace by removing the nuts and bolts from the brace. During reassembly, torque bolts and nuts to 80 Lb-in. (9 N.m).
4. Remove the screws and remove the LH floor duct.
5. Carefully pry and disengage the center instrument panel finish panel retaining clips. Disconnect all electrical and vacuum connectors from the climate control unit and 4X4 switches (if equipped).
6. Remove the screws and detach the LH temperature blend door actuator from the heater core and evaporator core housing assembly (Figure 5) by:
a. Removing the "Lower Bolt" using a 5/16" (8 mm) 12 point box end wrench.
b. Removing the "Forward/Middle" bolt by using a 5/16" (8 mm) 12 point box end wrench (Figure 4).
c. Removing the "upper bolt" (Figure 3) using a 1/4" nut driver with a 12" long extension, universal and 5/16" (8 mm) 6 pt. shallow socket (Figure 2).
7. Disconnect the electrical connector and remove the temperature blend door actuator.
8. Install foam seal, Part Number F57Z-19A672-CA on the actuator (Figure 1).
9. To install, reverse the removal procedure
Parts Block
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
030704A Verify Condition And Install 1.0 Hr.
Foam Seal On Blend Door
Actuator (Includes Time To
Remove And Install Center
Console And Blend Door
Actuator) 2002
Explorer/Mountaineer 4
Door Only
DEALER CODING
CONDITION
BASIC PART NO. CODE
19850 33
OASIS CODES: 208000 208300, 208999, 702000, 702300
Disclaimer