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Chevy Forum: Acid smell from heater / ac system 06 cobalt
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  #1  
Old 09-29-2017, 01:21 AM
Maintenancemark Maintenancemark is offline
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Default Acid smell from heater / ac system 06 cobalt

Got in my cobalt tonight, fired it up. Turned on ac and got acid fumes . Anybody have thoughts ? Also once I find and fix problem z how do I flush HVAC system?
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Old 09-29-2017, 09:28 AM
zora zora is offline
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Default Re: Acid smell from heater / ac system 06 cobalt

do you have any warning lights on?
the battery I believe is in the trunk, have you checked it?
you are sure the smell isnt engine coolant/antifreeze?
have you checked the coolant bottle fluid level when cold?
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Old 09-30-2017, 07:30 PM
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Quote:
Originally Posted by zora View Post
do you have any warning lights on?
the battery I believe is in the trunk, have you checked it?
you are sure the smell isnt engine coolant/antifreeze?
have you checked the coolant bottle fluid level when cold?
Yes I checked coolant level it is full. It is definitely an acid smell. Battery seems ok but vent hose is missing. Replacing batt tonight . But if it were from bat fumes, it would smell like it in the car all the time. This is only when you turn the fan on
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Old 09-30-2017, 07:31 PM
Maintenancemark Maintenancemark is offline
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Quote:
Originally Posted by zora View Post
do you have any warning lights on?
the battery I believe is in the trunk, have you checked it?
you are sure the smell isnt engine coolant/antifreeze?
have you checked the coolant bottle fluid level when cold?
No warning ligjts
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  #5  
Old 10-01-2017, 09:52 AM
zora zora is offline
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Default Re: Acid smell from heater / ac system 06 cobalt

there is no other source of a true acid smell then the battery and missing the vent hose could be the cause.
Why are you replacing the battery?
Do you have the recirculate button pressed on?
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