Blower temporary rattling noise

22DRUMMER

MEMBER
2011 KIA SORENTO
2.4L
4 CYL
2WD
AUTOMATIC
100,000 MILES

Whenever I turn on the blower and try to use the upper cabin vents I get a rattling sound for about 6 seconds and then it stops. I removed the squirrel cage and it still rattles for about 6 seconds.

Tuesday, October 1st, 2019 AT 9:35 AM

3 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

This sounds like the actuator motor that is making the noise.

It is under the left side of the dash and a couple of things have to be removed to access the actuator.

Roy

Inspection

1. Ignition "OFF"
2. Disconnect the connector of mode control actuator.
3. Verify that the mode control actuator operates to the defrost mode when connecting 12V to the terminal 3and grounding terminal 4.
4. Verify that the mode control actuator operates to the vent mode when connecting in the reverse.

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5. Check the voltage between terminals 5 and 6.

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It will feedback current position of actuator to controls.
6. If the measured voltage is not specification, substitute with a known-good mode control actuator and check for proper operation.
7. If the problem is corrected, replace the mode control actuator.

Replacement

1. Disconnect the negative (-) battery terminal.
2. Remove the crash pad side cover(A).

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3. After loosening the crash pad lower panel mounting screws, remove the lower panel (A).

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4. After loosening the mounting bolts, then remove the reinforcing panel (A).

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5. Disconnect the mode control actuator connector after removing the air duct.
6. Loosen the mounting screws and then remove the mode control actuator (B).

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7. Installation is the reverse order of removal.

Images (Click to make bigger)