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A/C making noise on friends Yukon

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Old 07-23-2007, 10:30 AM
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Default A/C making noise on friends Yukon
My friends Yukon XL is making some strange whining sound when the A/c is on. He said its coming from behind the dash. Its an 02 Yukon XL. Any suggestions as to what it is and the fix?
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Old 07-23-2007, 11:10 AM
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Possibly the blower motor or a blend door stuck half way open? Does the noise increase with the blower fan speed? You could also try different air flow settings and see if the noise changes to try and narrow it down.
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Old 07-23-2007, 12:26 PM
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Orifice tube........
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Old 07-23-2007, 01:01 PM
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Originally Posted by 99Silver6.0
Orifice tube........
Whats that?
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Old 07-23-2007, 01:51 PM
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Originally Posted by 03GMC
Whats that?
converts the system from low pressure to high pressure
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Old 07-23-2007, 03:11 PM
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Isn't the orifice tube located out front by the condenser?
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Old 07-23-2007, 03:52 PM
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Im pretty sure my silverado does the same thing but it makes a loud noise like its letting of steam, from the passenger side towards the front of the truck
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Old 07-23-2007, 05:38 PM
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Originally Posted by Yogi Bear
Isn't the orifice tube located out front by the condenser?
Negative. Its right up by the firewall going into the dryer!

Orifice tube "hiss" really is normal.
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