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2007 Hyundai Elantra Question: What is the high-pitched whistling noise when my a/c is turned on?

 

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DNML911, 2.0L 4 Cylinder, Willowbrook, IL, May 06, 2013, 19:26
 Rookie

The a/c works fine but when it becomes hot outside, the noise gets louder. The max a/c setting on the knob does not work at all either. As you accelerate, the noise gets louder as well.

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  • Answer #1

    Greg's Orange Auto (13991 Answers) , Orange, CA - (714) 361-9386
    globalhelper May 07, 2013, 06:23
     Master

    COULD BE IDLER BEARING GOING BAD AND ONLY MAKES NOSE WHEN UNDER A/C LOAD

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  • Answer #2

    May 07, 2013, 07:03
    Profile_thumbnail
     Master

    Also have the ac compressor belt checked could be loose or defective. Has it's own belt.

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  • Answer #3

    May 10, 2013, 04:26
     Technician

    It could be your sway bar. If it is snapped it will make a thumping noise when you steer and will make no noise when going straight. It needs to be fixed immediately.http://www.lightdeal.co.uk/

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