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Old 03-25-2007, 08:03 AM   #1 (permalink)
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Air Conditioner "growl"

I have had my car for a month now, and have 2400 miles on it. Loved EVERY ONE OF THEM. Fortunate to live in Central Texas where I've had the top down for all but 4 days. On those few humid rainy days, I noticed from the start that when I turn on the air conditioner, there is a slight gurgly/growl noise. Is this normal? Has anyone else heard it? I live about 50 miles from the dealership where I bought it & I'm just wondering if it's worth the drive to see if it will go away or if it is just normal. Anyone?
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Old 03-25-2007, 08:12 AM   #2 (permalink)
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Originally Posted by Deb-Deb View Post
I have had my car for a month now, and have 2400 miles on it. Loved EVERY ONE OF THEM. Fortunate to live in Central Texas where I've had the top down for all but 4 days. On those few humid rainy days, I noticed from the start that when I turn on the air conditioner, there is a slight gurgly/growl noise. Is this normal? Has anyone else heard it? I live about 50 miles from the dealership where I bought it & I'm just wondering if it's worth the drive to see if it will go away or if it is just normal. Anyone?
Does it make this noise every time you turn it on or just the first time after it's been off for a while? Also, does it happen when the clutch engages automatically, or just when you turn the system on?
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Old 03-25-2007, 10:10 AM   #3 (permalink)
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Hard to tell over the internet is a noise is "normal" or not.

On the base Solstice with the 2.4L engine (like yours), some owners may comment on a growling or buzzing noise when the A/C is on.

This condition may be caused by any of the following:

• Cause 1 - Loose A/C Compressor Bolts

• Cause 2 -- Thermal Expansion Valve (typically a buzzing noise at 1500-2000 RPM)

• Cause 3 - Evaporator Tube Assembly Lines Contacting Front of Dash Sheet Metal

You could wait until your fist servicing and have the compressor bolts checked for tightness. Then you would not have to make a special trip back to the selling dealership or another Pontiac dealership. You could also have the dealership pre-order the bracket kit needed to isolate the lines, so if it was need, it would be in stock.

You could also check it out yourself, or have someone more local. The bolts should be tighten in sequence (Top Front, Rear, Bottom Front) to 22 N·m (16 lb ft). Same torque for the A/C Compressor and Condenser Hose Assembly Bolt.

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Last edited by Small Dealer; 03-25-2007 at 07:53 PM.
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Old 03-25-2007, 10:52 AM   #4 (permalink)
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I have had that happen too. I am going to live with it for now as my dealer experience has been very poor other than buying the car.
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Old 03-25-2007, 11:17 AM   #5 (permalink)
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Originally Posted by AustinTashis View Post
Does it make this noise every time you turn it on or just the first time after it's been off for a while? Also, does it happen when the clutch engages automatically, or just when you turn the system on?

My car is an automatic, so it's basically every time I turn on the air conditioner.
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Old 03-25-2007, 11:19 AM   #6 (permalink)
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Originally Posted by Small Dealer View Post
Hard to tell over the internet is a noise is "normal" or not.

On the base Solstice with the 2.4L engine (like yours), some owners may comment on a growling or buzzing noise when the A/C is on.

This condition may be caused by any of the following:

Cause 1 - Loose A/C Compressor Bolts

Cause 2 -- Thermal Expansion Valve (typically a buzzing noise at 1500-2000 RPM)

Cause 3 - Evaporator Tube Assembly Lines Contacting Front of Dash Sheet Metal

You could wait until your fist servicing and have the compressor bolts checked for tightness. Then you would not have to make a special trip back to the selling dealership or another Pontiac dealership. You could also have the dealership pre-order the bracket kit needed to isolate the lines, so if it was need, it would be in stock.

You could also check it out yourself, or have someone more local. The bolts should be tighten in sequence (Top Front, Rear, Bottom Front) to 22 Nm (16 lb ft). Same torque for the A/C Compressor and Condenser Hose Assembly Bolt.
Thanks! This is very helpful.
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Old 03-25-2007, 01:07 PM   #7 (permalink)
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My car is an automatic, so it's basically every time I turn on the air conditioner.
I was referring to the AC compressor clutch.

When the AC gets cold enough, the clutch on the compressor disengages. You can usually hear it on most cars because it takes a load off the engine. I'm wondering if this same growling noise occurs every time the clutch re-engages.
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Old 03-25-2007, 03:23 PM   #8 (permalink)
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Oops. It may be obvious that I have this car for the looks and know nothing about cars. LOL I'll try to listen for what you've described...
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Old 03-25-2007, 04:09 PM   #9 (permalink)
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...ver noisy

my GXP makes noise when the a/c is on, and my NA Sol did too. Seems to be only with the a/c, not just with the fan, yet it sounds like a noisy fan.
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Old 03-25-2007, 07:16 PM   #10 (permalink)
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Some of the early cars had air conditioners that were under-filled. My first Solstice made the same noise. My second car, produced later, does not. -Lumix
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Old 03-25-2007, 08:43 PM   #11 (permalink)
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Mine does. I have a list of things for the dealer when i get around to taking it back. Nothing major but this sounds like a bearing problem. A loud whirr when the fan is turned on.

Definitely not normal
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Old 03-25-2007, 08:55 PM   #12 (permalink)
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Some of the early cars had air conditioners that were under-filled. My first Solstice made the same noise. My second car, produced later, does not. -Lumix

Great point for those reading the thread that may not have a 2007 like Deb-Deb.

A 2006 Solstice would have low charge, which can cause excessive cycling, on the list of possible noise causes.
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Old 03-25-2007, 10:43 PM   #13 (permalink)
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Some of the early cars had air conditioners that were under-filled. My first Solstice made the same noise. My second car, produced later, does not. -Lumix
AC check is on our list for the dealer, too. We've had a similar noise that needs to be investigated. What's the chance of permanent damage if it was under filled?
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Old 03-26-2007, 03:11 AM   #14 (permalink)
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AC check is on our list for the dealer, too. We've had a similar noise that needs to be investigated. What's the chance of permanent damage if it was under filled?
I wouldn't think it would cause any permanent damage, but I could be totally wrong. I'm afraid that I'm just not an air conditioning man so I couldn't say for sure. A lot of the 06 Solstices had low charge but I haven't heard of any of them being damaged.
Most of the time, they would just go through short periods where the temperature would rise quickly and then cool back down several seconds later. -Lumix
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Old 03-26-2007, 04:43 AM   #15 (permalink)
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I wouldn't think it would cause any permanent damage, but I could be totally wrong. I'm afraid that I'm just not an air conditioning man so I couldn't say for sure. A lot of the 06 Solstices had low charge but I haven't heard of any of them being damaged.
Most of the time, they would just go through short periods where the temperature would rise quickly and then cool back down several seconds later. -Lumix
Just that the low pressure side would be much lower than normal, making the chance of atmosphere leaking in that much higher if there is a leak, but if the system remains sealed, it just makes the system work harder.
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