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girgle noise and AC

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SteveCZ Enthusiast

SteveCZ

Posted
Posted

Are you sure its the AC and not the heater core? I had / have an air pocket in my heater core that I've been trying to get rid of for a while, it goes, then it comes back.... then it goes, then it comes back....

 

Try checking the level of Dex Cool in your overflow tank, make sure its up to the proper line and loosen the cap on the tank and drive it for a day, then tighten it back up and see if it goes away

raiste Enthusiast

raiste

Posted
Posted

If it's like my 03 Sub, then it's normal. Though mine sounds more like a hissing sound as the refrigerant goes through when the AC is on. It was discussed quite a bit back in 2003.

snoman Senior Enthusiast

snoman

Posted
Posted
If it's like my 03 Sub, then it's normal.  Though mine sounds more like a hissing sound as the refrigerant goes through when the AC is on.  It was discussed quite a bit back in 2003.

 

 

 

 

 

My 89 does it and has almost always done it since it was new when shut down and when compressor cycles too. My 2000 does it too sometimes when conditions are right.

snoman Senior Enthusiast

snoman

Posted
Posted
My 04 Sierra makes those funky gurgle/hiss noises when the air is on as well.

 

 

 

 

 

They gurgle/hiss is from the freon no turning to gas as soon has it goes thru the expension valve becaue of either low evaporator temps of because the evaporator pressure it high enough that the liquid can not convert to gas instantly. The later is the most likely culprit.

ozman2005 Enthusiast

ozman2005

Posted
Posted

My '04 Suburban makes that noise as well. I've been told it's normal. I wonder if they changed anything with the system in recent years because my '01 Tahoe didn't make any noise.

 

Ozzie

snoman Senior Enthusiast

snoman

Posted
Posted
My '04 Suburban makes that noise as well.  I've been told it's normal.  I wonder if they changed anything with the system in recent years because my '01 Tahoe didn't make any noise.

 

Ozzie

 

 

 

 

 

You can remove some freon (R134a a few oz's) and sometimes the noise will go away

C1500 Enthusiast

C1500

Posted
Posted

Mine makes a gugleing noise when I first start out in the morning from the heater core. It has done it for quite some time, I don't think it's a problem just a little air in the cooling system. I just had to replace the core last week, I don't know if it's still doing it.

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