Blower Motor Whistle Noise | Explorer 2WD V6-245 | Heater Core Case TSB
Heater Core Case: Customer Interest
Blower Motor - Whistle Noise On High Speed
Article No.
94-10-17
05/18/94
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HEATER - WHISTLE NOISE IN HIGH BLOWER ON FULL HEAT - VEHICLES BUILT THROUGH 12/22/93
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NOISE - "WHISTLE" SOUND IN HIGH BLOWER ON FULL HEAT - VEHICLES BUILT THROUGH 12/22/93
LIGHT TRUCK:
1994 EXPLORER, RANGER
ISSUE:
A "whistling" noise may come from the dash while the blower motor is on high speed and the temperature control is on FULL HEAT. It goes away as the
knob is turned toward COOL. This "whistle" may be caused by a gap between the two plenum case halves where the blend door is positioned in FULL
HEAT.
ACTION:
Seal any seam leaks in the plenum to eliminate the "whistling" noise. Refer to the following procedure for service details.
1.
Verify that the "whistle" is caused by a seam leak in the plenum or a body seal issue.
a.
With the engine running, heater blower set at high speed, and the temperature lever in full heat position, confirm that the "whistle" exists.
b.
Roll down one of the windows at least 1" (25.4 mm).
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If the "whistle" goes away, then the concern is a body seal leak and should be located using body leak detection methods.
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If the "whistle" remains, a plenum seal leak exists. Refer to Step 2.
2.
Remove the plenum. Refer to the appropriate Service Manual, Sections 12-02B and 12-03B, for the removal procedures.
3.
Locate any seal leaks in the removed plenum and seal with rope sealer (D6AZ-19560-A) or equivalent.
4.
Reinstall the plenum assembly and verify that the "whistle" does not exist. Refer to the appropriate Service Manual, Sections 12-02B and 12-03B,
for the installation procedures.
PART NUMBER
PART NAME
CLASS
D6AZ-19560-A
Rope Sealer (Or Equivalent)
AG
WARRANTY STATUS:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION
TIME
941017A
Reseal Plenum Chamber
3.5 Hrs.
DEALER CODING
BASIC PART NO.
CONDITION CODE
19850
68
OASIS CODES: 208000, 702000, 702100
