AC making hissing noise

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Thread: AC making hissing noise

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    abhylash83 is offline [OP]
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    AC making hissing noise

    Hi friends,

    Some back ground on my car - It's a 2012 Cruze 2LT with 140,000 miles.
    Now the issue - When I turn the AC on I hear a hissing noise from the dashboard. Am not actually sure if the AC blows cold air since it's already pretty cold outside since last couple of day (I live in Florida). When I turn off the AC and just keep the fan on then I don't hear the hissing noise. Any idea what's wrong with the AC?

    Thank you.

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    Does the sound stay constant or is it when you initially turn it on? There will be an initial hiss as the pressure builds in the lines from the first time the compressor starts up, at least in my experience.
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    abhylash83 is offline [OP]
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    Thanks for the quick reply. I just went down and checked again. Now I don't hear the hissing noise but the AC doesn't throw cold air. I don't even think pushing the AC button engages the compressor anymore because usually when you push the AC button you see a drop in the RPM for half a second and now I don't see that happening.

    Quote Originally Posted by _MerF_ View Post
    Does the sound stay constant or is it when you initially turn it on? There will be an initial hiss as the pressure builds in the lines from the first time the compressor starts up, at least in my experience.

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    Quote Originally Posted by abhylash83 View Post
    Thanks for the quick reply. I just went down and checked again. Now I don't hear the hissing noise but the AC doesn't throw cold air. I don't even think pushing the AC button engages the compressor anymore because usually when you push the AC button you see a drop in the RPM for half a second and now I don't see that happening.
    What's the outside temperature? A/C compressor won't engage below 37* or so.

    But yes, initial hissing is normal, after which it should subside and put out cool air after 30 seconds or so.
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    abhylash83 is offline [OP]
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    Outside temperature is in the 70's - Florida weather
    Quote Originally Posted by jblackburn View Post
    What's the outside temperature? A/C compressor won't engage below 37* or so.

    But yes, initial hissing is normal, after which it should subside and put out cool air after 30 seconds or so.

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    Quote Originally Posted by abhylash83 View Post
    Outside temperature is in the 70's - Florida weather
    Lucky.

    It may have taken a rock to the condensor or something. Next step would be to check refrigerant pressures.
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    Quote Originally Posted by abhylash83 View Post
    Outside temperature is in the 70's - Florida weather
    Where in Florida are you?
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    Quote Originally Posted by jblackburn View Post
    Lucky.

    It may have taken a rock to the condenser or something. Next step would be to check refrigerant pressures.
    2012, it sounds like it's before condenser shield build range.
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    Quote Originally Posted by Merc6 View Post
    2012, it sounds like it's before condenser shield build range.
    Could be. Mine was one of the earlier models (10/11) and had one though.
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    Quote Originally Posted by jblackburn View Post
    Could be. Mine was one of the earlier models (10/11) and had one though.
    Seems like I don't have an actual date attached to the #PI for that.

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