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Old 06-12-2013, 10:53 PM   #1
doogee
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A/C Whining Noise

Anyone else get a hum/whining noise when their A/C is on?

The sound changes with RPM as well. Strange thing is, I can't seem to hear it on the outside of the car. It's quite loud on the inside.

Just curious if anyone else is dealing with this and if anyone knows what needs to be replaced.

My only guess would be the compressor.
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Old 06-13-2013, 09:27 AM   #2
Blades
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belt maybe on to tight which could have caused the damage to make it whine. I get zero whine but did get a little while in my e46 back in the day .. still worked fine .. whine was only present when radio was on with low volume so it could have just been interference
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Old 06-13-2013, 03:08 PM   #3
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Low freon charge or expansion valve. Have the A/C evacuated and recharged first and see if the noise goes away.

When the freon goes low the lines will start to vibrate/resonate.

Mark.
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Old 06-13-2013, 03:09 PM   #4
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Quote:
Originally Posted by MANDD View Post
Low freon charge or expansion valve. Have the A/C evacuated and recharged first and see if the noise goes away.

When the freon goes low the lines will start to vibrate/resonate.

Mark.
You might be right about the charge. I actually just took it to a shop to have it "topped up" but the noise was still there.

An evacuate and charge might do it some good.
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