calboy76

iTrader: (1)

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

mrblister

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

calboy76

iTrader: (1)

02 with 110k miles but serviced regularly . the noise is always there when i turn on the AC

JiBBeL

iTrader: (2)

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...

mrblister

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 .

Buddy

calboy76

iTrader: (1)

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

Pearlpower

iTrader: (2)

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.

JiBBeL

iTrader: (2)

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.

calboy76

iTrader: (1)

took my car in to the dealer. they said it's probably the air filter....but they are not very very sure....