A/C whine

[Clark Griswold]

I noticed recently that when my A/C is on there is an audible whine/howling sound coming from within. The pitch of this sound changes as I give the car more or less throttle. If I turn the A/C off (but the fans are still on) the sound goes away! Anyone else experiencing something like this?

I haven't noticed any temps changes across the vents (yet) and the system has no problem cooling or heating, just this odd sound that I swore wasn't there before. Car just turned over 8,800 miles. What gives?

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[VirginiaF1]

I noticed recently that when my A/C is on there is an audible whine/howling sound coming from within. The pitch of this sound changes as I give the car more or less throttle. If I turn the A/C off (but the fans are still on) the sound goes away! Anyone else experiencing something like this?

I haven't noticed any temps changes across the vents (yet) and the system has no problem cooling or heating, just this odd sound that I swore wasn't there before. Car just turned over 8,800 miles. What gives?

See this:
https://www.mustang6g.com/forums/showpost.php?p=2068877&postcount=135

My extended warranty covered the new Compressor & Labor.

 

[scoggy_doogan]

Mine was doing that and it turned out to be the compressor, which was failing due to the leaking evaporator. It whined for about 1 week before the temperature difference started.

I had evaporator, compressor, and accumulator replaced on mine.

 

[Clark Griswold]

Great, thanks for the info guys. Really sad to see this failing under 10k miles...

 

[scoggy_doogan]

Great, thanks for the info guys. Really sad to see this failing under 10k miles...

I feel you there. It sucks that such a great car is plagued with such a widespread A/C issue.

 

[Clark Griswold]

Just curious, how long ago were you experiencing this? And did you have success with the repairs?

 

[scoggy_doogan]

Just curious, how long ago were you experiencing this? And did you have success with the repairs?

The whine started around Thanksgiving this past year. I scheduled to get it looked at ASAP, unfortunately earliest appointment was 2 weeks later, mid December. Car died the day before I was going to bring it in (12/13). They replaced the evaporator, compressor, and accumulator while it was in. Also had fuel pump and water pump replaced (the reason it wouldn't run).

Got the car back a week later (12/20) and it seemed like the driver's side was still a tad warmer than passenger side. I was going to give it some time to see if it got better or worse before bringing it back. Unfortunately, I got t-boned on 12/27 and still don't have my car back. So I can't really tell anything about the A/C. Worse part is the impact was to the passenger A pillar and I'm worried that something might have been knocked loose with the A/C due to the impact. I should get my car back next week and I'll check over the A/C again.

 

[Clark Griswold]

Yikes, sorry to hear that man. I'm bringing mine in Monday. Will follow up when I have results...

 

[scoggy_doogan]

Yikes, sorry to hear that man. I'm bringing mine in Monday. Will follow up when I have results...

The good news is the service techs are really good at this repair.

 

[VirginiaF1]

Mine whined for 4 days and then got the dreaded snowflakes thru the vents.
Fixed in 1 afternoon.

 

[CEHollier]

Mine did the same. Evap coil leak. The whine was low freon. Like back in the day low power steering fluid whine. Changed the coil under warranty. Problem solved.

 

[Clark Griswold]

Just spoke with the dealer. You guys were spot on. New compressor and evaporator being installed. Hopefully these will last longer than 8,800 miles...

 

[millhouse]

Mine just started as well....almost 25k miles. Ug.

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