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Weird smell in truck with AC fan on

Discussion in '3rd Gen. Tacomas (2016+)' started by Cav_BluTRD, Jun 7, 2019.

  1. Jun 7, 2019 at 7:26 PM
    #21
    Sloweburn

    Sloweburn Well-Known Member

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    In case the cessation of flatulence doesn't solve the problem, check your AC drain hose.
    Pull the carpet back under the right side instrument panel. It goes from the HVAC through the right side floor.
    If the hose is twisted or pointing up instead of down, moisture can collect in your HVAC and get moldy - smell like rotten eggs...
     
    Norilsk likes this.
  2. Jun 7, 2019 at 7:45 PM
    #22
    Arries289

    Arries289 Yo!

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    You need to drill a 1/4" hole in the HVAC box itself. Insert the hose there and fill the entire box up. Then I plug the hole with a small screw.
     
  3. Jun 7, 2019 at 7:48 PM
    #23
    ChaseFan

    ChaseFan Dawsonville Pool Room

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    I saw a video on that but the guy used a rubber plug instead of a screw.
     
  4. Jun 7, 2019 at 7:49 PM
    #24
    Arries289

    Arries289 Yo!

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    Either way works fine. But the stuff does work for sure. All the mold crap (or most of it) drains right out the drain tube.
     
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  5. Jun 7, 2019 at 7:56 PM
    #25
    ChaseFan

    ChaseFan Dawsonville Pool Room

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    I'm hoping my '19 SR don't have that issue. But if it starts smelling like cow manure like the '16 SR5 did I'll know what to do.

    I even saw a video where a guy took the blower motor out and stuck the hose in the evap box that way. The hole sounds easier though.
     
    shakerhood likes this.
  6. Jun 7, 2019 at 8:01 PM
    #26
    StayinStock

    StayinStock Whatever

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    These threads don't always take off like you hope. Not sure why the ass thread is raging on, but hey, you never know.
     
    stun gun, ChaseFan and Gritto like this.
  7. Jun 7, 2019 at 10:52 PM
    #27
    BearWithMe

    BearWithMe Well-Known Member

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    My OR developed a musty/sour smell in the AC within the first couple weeks of ownership. Had a Subaru for 13 years that never developed the smell.

    Frustrating that Toyota can’t figure this out but I hardly ever use the AC even in summer, so I’m not too put out.
     
  8. Jun 8, 2019 at 2:52 AM
    #28
    CountofQ

    CountofQ Well-Known Member

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    Agreed!!

    I am 50 years old and have been driving since I was 15. Fords, Chevys, Dodge, Jeep, and more. Have never had an automobile AC system that stinks like this Taco does. WTF???

    Have never had to adjust ac settings in any vehicle with hopes of avoiding a musty, moldy smell. And if it's mold... isn't that an environmental issue with possibly quite serious implications?

    Luckily, the smell goes away fairly quickly. Seems it's worse when changing to (or from) A/C and Heater.
     
  9. Jun 8, 2019 at 3:16 AM
    #29
    06Tacooo

    06Tacooo Earth Czar

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    Could be a dead mouse in the blower housing. Lift the windshield cowling, see if the cabin air filter has a hole chewed through it. If not, at least cover the opening with 1/4" hardware cloth, so it doesn't happen.
     
  10. Jun 11, 2019 at 12:15 PM
    #30
    ChaseFan

    ChaseFan Dawsonville Pool Room

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    I noticed a cow shit odor coming out of my vents this morning when I drove into town. :( This truck was built SEP. of 2018. Not even 9 months old yet. I made sure I kicked the recirculate off everytime I turned the A/C on. Buddy had a 2017 TRD Sport and he never switched the recirculate button when he turned his A/C on it was on whatever the system had it on. He ran his A/C till he got to where he was going then shut it off. He never had any issues with odors in his A/C.

    I'm not going to bother switching my recirculate button off anymore. I'll run the a/c till I shut the truck off. Might as well..
     
  11. Jun 11, 2019 at 12:24 PM
    #31
    Cudgel

    Cudgel “Tonka”

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    Lost as a teen...now it’s too late to grow up.
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    ^^post 13 is correct
     
  12. Jun 11, 2019 at 1:27 PM
    #32
    Dryfly24

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    It is. I’ve been sneaking in your truck and doing it too.
     
    Cav_BluTRD [OP] likes this.
  13. Jun 11, 2019 at 9:26 PM
    #33
    Captqc

    Captqc Well-Known Member

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    In my neck of the woods you have to clean the cabin air filter every three months (I have a washable K&N) because of the tons of tree pollen that gets sucked in!
     
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  14. Jun 12, 2019 at 4:21 AM
    #34
    ChaseFan

    ChaseFan Dawsonville Pool Room

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    If I knew those K&N washable filters would fix my issue...I would be glad to wash one out every 3 months.
     
  15. Jun 12, 2019 at 3:27 PM
    #35
    Captqc

    Captqc Well-Known Member

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    Don’t know if it would fix your issue but I do know it sure smells better after I clean the filter.
     
  16. Jun 12, 2019 at 3:30 PM
    #36
    gmiller

    gmiller Member

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    It must be Friday already
     
  17. Jun 14, 2019 at 6:12 AM
    #37
    ChaseFan

    ChaseFan Dawsonville Pool Room

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    Anyway you can send me a picture of where to drill? I'll need to take it to a local shop and point out where I need the hole drilled.
     
  18. Jun 14, 2019 at 6:34 AM
    #38
    Jim1946

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    That’s what I do. I have never had odor issues since.
     
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  19. Jun 14, 2019 at 7:19 AM
    #39
    ChaseFan

    ChaseFan Dawsonville Pool Room

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    I think it has allot to do with what part of the country you live in and your driving habits. I live in town and drive to Walmart, gas station, laundry mat. If I were to shut my a/c off before I get back to the apt. and let the fan run, I might as well not use it at all.
     
  20. Jun 14, 2019 at 7:30 AM
    #40
    Tacowin1013

    Tacowin1013 Well-Known Member

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    I used to have to do this with an old Audi i had growing up, i would blast the heat (yes in the middle of a 90 degree summer day) open all the windows and let it run for about 5 minutes, that will dry everything up. And it seemed to get rid of the musty smell for a few weeks. Or as others have suggested, turn off AC before you get home and let it air out. Its hard to remember though, or if you are driving with someone else and they say "wtf you trying to kill me?"
     
    shakerhood likes this.

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