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Old 01-13-09, 02:25 PM   #1
calboy76
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Exclamation noise(?) coming from AC Conditioner

whenever i turn on the AC, i always hear this "hissing" sound coming from the left of the dash

when i turn off the AC, the hiss goes away

i took it to the dealer, the tech told me it's normal since the high pressure air goes through low pressure bla bla bla....so the hose makes some noise


i am just wondering, am i being too sensitive or this is not normal?

thanks
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Old 01-13-09, 03:59 PM   #2
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Default Noise

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Originally Posted by calboy76 View Post
whenever i turn on the AC, i always hear this "hissing" sound coming from the left of the dash

when i turn off the AC, the hiss goes away

i took it to the dealer, the tech told me it's normal since the high pressure air goes through low pressure bla bla bla....so the hose makes some noise


i am just wondering, am i being too sensitive or this is not normal?

thanks

I live in the north east I have a 2005 When I use it in the summer most of the time I have the top down so I might not hear the noise. I dont think the car should make any noise I would try another dealer. What year is your car
and did this noisejust start or was it allways there

Buddy
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Old 01-13-09, 04:16 PM   #3
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02 with 110k miles but serviced regularly . the noise is always there when i turn on the AC
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Old 01-13-09, 04:24 PM   #4
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I got the same problem. It's most annoying when idling at a stop... it's faint but high-pitched. Wish I could figure out how to fix it...
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Old 01-13-09, 04:31 PM   #5
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Default Are we talking about an sc430

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I got the same problem. It's most annoying when idling at a stop... it's faint but high-pitched. Wish I could figure out how to fix it...
I looked at both your profiles and there is no sc430 listed Is the noise coming from the air conditioning vent in what year sc430 .

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Old 01-14-09, 12:35 AM   #6
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yes. noise coming from the air conditioner vent, in my case, it comes from the left one. i just recent purchsed this car. in fact, only six days ago
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Old 01-14-09, 06:35 PM   #7
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AC on only or any vent air causes this noise? AC itself will not cause a higher pressure of air to come through the vents. The blower motor causes the air pressure. If your getting noise from the left vent I would look into an air leak there (lined with a little felt from the factory) or perhaps something got sucked into the system and is causing the noise.
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Old 01-19-09, 08:37 AM   #8
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Mine's a gs430, so lotsa the same parts. And yeah, mine comes from the far left air vent, only when the AC is on.
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Old 01-19-09, 11:43 AM   #9
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took my car in to the dealer. they said it's probably the air filter....but they are not very very sure....
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2003, 2005, ac, air, conditioner, hissing, lexus, ls430, lx, making, noise, sc430, sound, vent, vents

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