Noise when A/C is on

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Da3doo3

Member
I have a problem with my car. I own 2010 Infiniti FX50S. The problem: a noise comes behind the dashboard only when the A/C is on. The noise gets louder every time I step on the gas. Note that when the A/C button is set on "off" and the system is on "refresh mode", the noise fades away/stops. But once I switch on A/C button the noise comes out again. It is more like a moan or whine that penetrates the cabin. Also, as I mentioned earlier the noise only comes from somewhere behind the dashboard not from the engine itself. My dealer replaced the compressor with a brand new one, but the noise is still there.

PLEASE help me with this one. The noise is really really annoying!
 
no need for 2 threads for the same thing. it does sound like the compressor or the gas/fluid compressed system making the noise though
 
Thanks MTN FX, Dracula, and turbocad6 for replying.

I already replaced the whole compressor with new one, but the noise/whine is still there. Moreover, My Infiniti dealer contacted the headquarters in both Japan and Dubai to inform them about this, but they said they didn't encounter such issues.

Could it be from the the fan blades?!
 
Have you had extreme weather lately really hot or cold? sometimes a factor. But when you said when you hit the gas makes noise it has to be bad bearings either alternator, clutch and/or (A.C)
Last thing i can think of is too low pressure of refrigerant in system or lack of oil in system. Or equally too high a pressure in the system
 
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As part of the ventilation system there are doors that open and close to direct air flow to differnt ducts inside the car. These doors are usually operated by vacume diaphrams with vacume lines attached to them. A leak in a diaphram or line can cause very unusual noises. Could it be? Good Luck
 
Thanks guys!

I'll make a visit soon to Infiniti service center, and I'll tell them about these things!

Wish me luck :)
 
I have the same issue, A loud hissing whining noise. Any details out there would be helpful. Taking it to the dealer soon.









Da3doo3 said:
I have a problem with my car. I own 2010 Infiniti FX50S. The problem: a noise comes behind the dashboard only when the A/C is on. The noise gets louder every time I step on the gas. Note that when the A/C button is set on "off" and the system is on "refresh mode", the noise fades away/stops. But once I switch on A/C button the noise comes out again. It is more like a moan or whine that penetrates the cabin. Also, as I mentioned earlier the noise only comes from somewhere behind the dashboard not from the engine itself. My dealer replaced the compressor with a brand new one, but the noise is still there.

PLEASE help me with this one. The noise is really really annoying!
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