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heat/AC air routing question, trying to locate source of bad smell

Discussion in 'Interior' started by slowride, Oct 7, 2020.

  1. slowride

    slowride Full Access Member

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    Im getting a smell of mouse piss through the vents of my 06 Tahoe only when using heat settings, no smell at all when using the AC. I let this vehicle sit for about a year outside at a storage place and I think mice might have built a nest in there somewhere and Im trying to figure out how the HVAC system works so I know where to look. Do the heat and AC have different routing? I was thinking if there was a mouse nest or whatever in the outside air inlet or the blower motor area I would get the smell out the vents either way with heat or AC on but as I said I only get the smell when its turned to heat. Thanks for your help
     
  2. PNW VietVet

    PNW VietVet Supporting Member

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  3. Galante

    Galante Supporting Member

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    Yeah, mouse piss has that distinctive smell. Go up under the dash on the passenger side and pull down the kick plate... 5-6 screws. Youll see the blower motor and filter cover ( if installed) I’d start there. They prob have the nest right under the kick plate.
     
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  4. Galante

    Galante Supporting Member

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    Here’s some pics ED149C35-2F55-4C46-A545-E29734926D2B.jpeg 62698AF8-2E60-49D0-A5ED-F6332BDAA2A0.jpeg E798792A-3BF0-4CB0-A6B5-8F7C276E7CEA.jpeg 5B96ADF8-21DD-400F-B3BE-A1D21B0E6BC6.jpeg
     
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  5. slowride

    slowride Full Access Member

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    Thanks for the pics, will take a look in there. The Tahoe has rear heat and AC as well but the smell only comes out when running front heat. Yeah unfortunately I have enough experience dealing with mice that I have learned their smells
     
  6. PNW VietVet

    PNW VietVet Supporting Member

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    What @Galante posted is the likely source of your problem.
     
  7. slowride

    slowride Full Access Member

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    9F4C78B3-B7EC-4BCD-9C2C-981E88A3B757.jpeg pulled the fan, didnt find anything
     
  8. PNW VietVet

    PNW VietVet Supporting Member

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    What about where the cabin filter is?
     
  9. slowride

    slowride Full Access Member

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    I dont see where the cabin filter is but feel free to educate me. I was trying to see how I could access the area to the left of the blower, towards the driver side, to check in there but I couldnt find anything online other than instructions for removing the dash to change the heater core.
     
  10. Fjs0001

    Fjs0001 Member

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    2005 didn't have a cabin filter. Mine had a bad smell and I sprayed an entire can of lysol into the AC air intake to kill the bacteria.
     

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