when i turn the car on, i can hear and feel air coming from the vents and the ac aint even on. After i turn the ac on, 10 seconds later theres a loud air noise coming from the hood. Its pretty loud and it makes that noise only when im parked and have the ac on. Need help!

 

1.) Air coming out of vents - Sounds like the blower transistor died and needs to be replaced. Easy fix.

2.) Air noise from under hood - No idea. Belt, pulley, fan...need better description and what part of the engine bay.

 

1. How much does it go for? And just awhile ago water came out of the two top vents above the navi..

2. Ill make a video tomorrow and post it.. The noise comed frm the front-bottom left by the pullys.

 

DON'T START THE CAR. Water may be coming from a clogged ac drain pipe, which causes water to back up and eventually flood and short out the ECU. THAT would be pretty expensive to replace.

 

Yea, sounds like a clogged drain line. If the ECU shorts out, I have my ECU from my old car that I am selling. I can sell it to you cheaper than the dealers. Hopefully you don't have to go that route though!

 

 

 

does it look good or bad? Not sure? The cables and connecters look good still.

 

Don't think you can tell good/bad from an external view. Only way to tell is testing it or taking it apart to see if anything is burned. I never took mine apart, I just swapped it out. My symptoms weren't exactly the same as yours....my HVAC blower wouldn't come on half the time or would just stop. Others have issues with the blower always being on. Just depends on how it fails. Mine was failing open, while others have it fail closed.

As for the noise? Is it engine RPM dependent? Or is it a "gassing/hissing" sound that slowly goes away? Difficult to tell by the videos...

And for f'sake, stop doing multiple posts for the same thing. You haven't provided much more detail for anyone to really go off of. We only have a very brief description of the issue/sound along with a video from inside the car, not from the outside.

 

I have one of those sensors as well.

We need more details!

 

or maybe it could be the blower motor? what happens when you increase fan speed? I replaced one on a benz SUV before and the part was roughly around $50. Those are usually located under the cabin air filter

 

when i turn the car on, that air noise in my video goes on with light air coming out of vents and my ac is off then doesnt go away like in 5 mins but the air still comes out. Then i turn the ac on you can still hear that air noise in the backround. You can only hear it through the vents. I cant hear nothing outside my car.

They told me it might be the ac control unit??

 

hopefully it is the blower motor! When i increase fan speed the air comes out cold and it blows alot of air but you can hear that noise still in the backround..

 

could it cause the car not to turn on??
Cause my didnt want to start? Everything turns on but wont start?? Just bought a new battery, lets see what happens

 

Does it click when you try to start it?

 

yea it does like a couple clicks.. Then when i try to turn it on a couple times it doesnt click anymore but everything turns on

 

Did the new battery do the trick?

 

Look, it sounds like you have two different issues going on.

1) Loud air noise
2) Water coming out from the vents

In regard to 1, does the sound get louder if you turn up the fan speed? If so, then I'd take a look at the blower motor. If the cabin fan is completely off and you still have the sound coming, then you'll have to keep digging.

With regard to 2, it sounds like you may have a roof or ac drain pipe clog somewhere, causing water to back up and spill out. If this water ends up leaking onto the ECU, your going to have much bigger problems than just loud air noise.