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Air conditioning smells like Cow Manure

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Old 06-09-2017, 06:39 PM
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Originally Posted by kalh7
I used lysol but i sprayed it into the fresh air inlet instead. Seems to be a yearly thing to have to do. I've heard that if you turn your ac off several minutes before parking that it helps with this not happening, that's what i try to do. It helps with not having moisture collect in the air ducts therefore this not occurring.
Need to do both fresh air intake and recirc intake (below glove box). Haven't been shutting the ac off until I'm at work or home. Ford had a TSB years ago on Ford Contour/Mercury Mystique where in we would install a fan blower delay relay into the circuit to keep the blower fan running after shut down for a while to dry out the evap.

We saw a lot of dead batteries as a result so Ford nixed the fix LOL.
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Old 06-10-2017, 12:48 AM
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I want to add that it may help if you snake the drain tube carefully and slowly.
I had that smell equal to the worst on here.
Along with the cleaner "Supposedly" made to kill the mold or whatever is going on in there.

It's been two years and not even a whiff. I'm only saying this as an option, because I had success.

Last edited by Masi1926; 06-10-2017 at 08:34 PM.
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Old 06-10-2017, 08:27 PM
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Where can I find this drain tube? Where under the dash are you spraying? Etc...
Old 06-10-2017, 08:31 PM
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Originally Posted by jhelrey
Where can I find this drain tube? Where under the dash are you spraying? Etc...


On my 13 it was real hard to see on the fire wall passenger side behind the valve cover. Its real short.


Passenger side foot area, turn on ac and just spray, it will get sucked up in and you will smell it coming out of the vents.
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Old 06-16-2017, 02:47 PM
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Still cannot locate the drain tube. I'm not seeing water spots on my driveway so I am guessing this is half my issue.
Old 06-16-2017, 03:05 PM
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Originally Posted by jhelrey
Still cannot locate the drain tube. I'm not seeing water spots on my driveway so I am guessing this is half my issue.
Look at the pics here for some guidance:

https://www.f150forum.com/f4/ac-drai...drainage-5985/
Old 06-16-2017, 04:04 PM
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Found it.

Last edited by jhelrey; 06-16-2017 at 05:02 PM.
Old 06-18-2017, 11:12 PM
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I finally followed the Lysol advice and mine has been odor free for a week. But my drain has never drained anything that I've seen. Really need to try to clean it out.
Old 04-22-2018, 02:59 PM
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I have the same smell in my 2012 f150. Just started about a month ago. Did anyone ever get a good fix?
Old 04-22-2018, 03:09 PM
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Originally Posted by ProAktion
I have the same smell in my 2012 f150. Just started about a month ago. Did anyone ever get a good fix?
Lysol as mentioned before, mine is still stink free since I sprayed it.
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