Strange noise from A/C vents
 

Okay, this is odd. We've had the HHR for exactly two years tomorrow. Yesterday we drove down to LA and on the way home I noticed something that sounded like a waterfall coming from the A/C vents. After listening more, I realized that it only does it when I am accelerating. I started changing settings to try to get an idea of what was causing it. The strangest thing is that it even does it with the A/C turned off.

Anyone ever noticed anything like this in your HHR? I'm not losing water. Could I have possibly been driving this thing for two years and never noticed this?

2006 Chevrolet HHR | HHR (VIN A) Service Manual | Document ID: 1853400
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#06-01-38-004B: Growl Noise from Engine Compartment (Replace Condenser Tube and Evaporator Hose Assembly) - (Aug 7, 2006)


Subject: Growl Noise from Engine Compartment (Replace Condenser Tube and Evaporator Hose Assembly)


Models: 2006 Chevrolet HHR
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This bulletin is being revised to update the warranty information. Please discard Corporate Bulletin Number 06-01-38-004A (Section 01 -- HVAC).


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Condition
Some customers may comment on a growl noise coming from the engine compartment. The customer may associate the noise with turning on the A/C system.

Correction

Replace the condenser tube and the evaporator hose assembly.

Do not replace the A/C compressor assembly.

Technicians are to replace the condenser tube, P/N 15877652, and the evaporator hose assembly, P/N 15877651. Refer to the Condenser Tube Replacement and the Evaporator Hose Assembly Replacement service procedures in SI for more information. Install a clip, P/N 15991719, at the location shown by callout number one in the illustration above. Verify proper operation of the A/C system after replacement of these parts.

Parts Information Part Number Description Qty

15877651 Hose Assembly-A/C Evaporator 1

15877652 Tube Assembly-A/C Condenser 1

15991719 Clip 1
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Another cause might be that you are low on coolant and it is coming from the Heater Core,

Thanks ChevyMgr. I've got to go in for the air bag recall anyway so I will have them check it. Coolant is not low so I am assuming the other.

Do you notice water dripping under car when running A/C? If not maybe A/C drains are plugged up. This is common to many cars and you will hear the water collecting in hvac case moving around.
Brwbier

Chevy Mgr...once again, your are the BEST!!! Bless you for being so helpful!!!!!