Question about 2004 Chevrolet Tahoe

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Air conditioning fan makes loud noise the faster you ru it.

The A/C fan under the dash suddenly started making a loud noise. The passenger side's left vent doesnt work. It has dual controls and passenger side is blowing warm instead of cold now. So three things are wrong. Broken Vent, loud noise and passenger doesn't blow cool.

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  • Melvin Estes Apr 22, 2009

    This peron obviously is a pro and knows what they are saying. It makes perfect sense to me. I wished I could pay this person to fix it.

  • yadayada
    yadayada May 11, 2010

    which one thing do u desire an answer on? this is a FREE forum time is limited.

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  • Master
  • 6,784 Answers

Concerning your broken vent -- this can be caused by a broken linkage or a malfunctioning servo motor as well. these vent have air ducts the sway back and forth to adjust the dual air flow function. if the servo o linkages are malfunctioning or not connected for some reason, it will not allow total control of the air flow and temperature range. Now, if you have a combination of a flow error and temperature error as well, thai can be caused by a combination of the two.

In this case, you will need to inspect the linkages as well as the servo motor function as well. in addition, i would test the air temp sensors for there operational value. they control the temp when you adjust the coll or hot function.

Concerning the Loud noise coming from the blower fan---

This issue can be caused by a misalignment within the blower housing or, it can also be caused by some minor damage within the motor itself, causing it to rotate in a erratic manner, in return, forcing it to rub against the housing itself. the best solution here is to extract this blower fan housing and inspect for lose fan propeller and motor stability. replace parts accordingly.

PLease rate and have a great day:)

Posted on Apr 22, 2009

  • Michael Masters
    Michael Masters Apr 22, 2009

    Thank you for that awesome compliment. I do greatly appreciate your thoughts:)

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