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Thread: Noisy AC doors?

  1. #1
    Beyond Help
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    Default Noisy AC doors?

    When I start the car, I usually hear a thunk/click that I didn't used to hear, coming from in the dash. How many air actuator/flaps/door things are in there, and are any very difficult to replace? Should I be prepared to lose temp control or vent selection control?
    09 G8 GT SRM Premium Sport Sunroof



    HSV GTS Triple Gauge Pod, GXP Rear Sway Bar and Diffuser, HSV SuperSport Steering wheel, SOLO axle-backs, Magnaflow cats, Red Hot Shift Knob, Auto-dim Mirror, Hood Vent Mod, Removed Intake Cover, Rotofab CAI, Cortex, Infinity door speakers, MTX Re-Q5, Pioneer Amp & RF Sub, LED lows & fogs, Spyder tails, Power Slot rotors, Wagner Thermoquiet pads, Chrome lug covers, Glovebox light,

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  2. #2
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    Same problem here. Funny, my old Impala SS did the same thing!

  3. #3
    VIP Member pokey's Avatar
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    Interesting... Every "problem" I've found with my car I think I've found others with the same and here is another.

    OP, do you hear the same sound when your HVAC system goes into pollution control mode or recirculate? Mine has been making a noise in those situations forever.. was even under warranty yet but I didn't have the energy to complain and didn't want my dash torn apart. If your is the same I think you will be ok, except for trying to ignore the noise.
    '09 White Hot GT, Premium, Sunroof - SOLD May 2021

    Holden leather armrest, rear ashtray/cig lighter, Homelink, Auto dimming rearview mirror, Atari gauges by SAS & GTPprix, glove box light, LCD interior lights, GXP diffuser, 6.0 litre badges, painted calipers, BMR subframe connectors & drive shaft tunnel brace, Polk DB651 & DB6501 component speakers, Factory bluetooth, BMR x-member bushings, Corsa, many dealer installed mods (ie Fixes ). Waiting to install: Nothing.. I need to find the credit card!

  4. #4
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    I haven't noticed it at any time but cold starts.
    09 G8 GT SRM Premium Sport Sunroof



    HSV GTS Triple Gauge Pod, GXP Rear Sway Bar and Diffuser, HSV SuperSport Steering wheel, SOLO axle-backs, Magnaflow cats, Red Hot Shift Knob, Auto-dim Mirror, Hood Vent Mod, Removed Intake Cover, Rotofab CAI, Cortex, Infinity door speakers, MTX Re-Q5, Pioneer Amp & RF Sub, LED lows & fogs, Spyder tails, Power Slot rotors, Wagner Thermoquiet pads, Chrome lug covers, Glovebox light,

    Winter-wear:
    Bremmerkraft BR09 winter wheels, Weathertech floor liners, oil pan heater

    Admin: www.pontiacbonnevilleclub.com

  5. #5
    VIP Member pokey's Avatar
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    Mine I hear a "squeak" when a door closes and opens behind the dash hitting the recirculate button. I don't think I've noticed anything during starts..I'll have to listen next time.
    '09 White Hot GT, Premium, Sunroof - SOLD May 2021

    Holden leather armrest, rear ashtray/cig lighter, Homelink, Auto dimming rearview mirror, Atari gauges by SAS & GTPprix, glove box light, LCD interior lights, GXP diffuser, 6.0 litre badges, painted calipers, BMR subframe connectors & drive shaft tunnel brace, Polk DB651 & DB6501 component speakers, Factory bluetooth, BMR x-member bushings, Corsa, many dealer installed mods (ie Fixes ). Waiting to install: Nothing.. I need to find the credit card!

  6. #6
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    Kangaroo fart

    Rotohack 102 intake - 102 MAF - TPIS 102 TB - TVS1900 ported & plated w 8 rib 2.5" front + OD rear
    PnP Interchiller - RCR ported heads - RCR Lunati 219/231 113+1 - Forged Bottom End
    ARH 2" LT headers - Solo 3" CB - MT DRs + M&H FRs on Weld RT-S
    CTS-V fuel w Vaporworx - FAST 85s - Alkycontrol meth M15 + M10 - RCR tune
    9.75@139.2 ? rwhp ? rwtq

  7. #7
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    Mine does the kangaroo fart between circulate and recirculate. It also goes "thunk" or "whack" when I change from defroster/high vents/floor vents. I have to lower the fan speed before change settings to prevent the thunking. Id also like to know what the fix for this issue is.

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