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  #1  
Old 03-28-2015, 07:20 PM
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Sour smell from air conditioner

We had this problem in an Xterra years ago when we were in Florida but never did in our 4Runner. We were told it had to do with the design of the system and the humidity.

Now our 2015 Grand Cherokee has a very foul, sour smell when running the A/C. It isn't a constant smell but seems to surge its funk randomly as we drive down the road. We're in Colorado, so humidity is fairly low. What's causing this and how can I fix it?

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  #2  
Old 03-28-2015, 10:44 PM
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Quote:
Originally Posted by bofa View Post
We had this problem in an Xterra years ago when we were in Florida but never did in our 4Runner. We were told it had to do with the design of the system and the humidity.

Now our 2015 Grand Cherokee has a very foul, sour smell when running the A/C. It isn't a constant smell but seems to surge its funk randomly as we drive down the road. We're in Colorado, so humidity is fairly low. What's causing this and how can I fix it?
I had a similar experiance with sour smell. There is a new cabin filter that came out recently for the problem the diesels have with diesel smell inthe cabin. The new cabin filter has charcoal in it,though intended for the diesel it works in any of the GCs. I currently have it in mine. Here is part number 68260792AA
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Old 03-29-2015, 12:06 PM
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Re: Sour smell from air conditioner

Mine has the funk smell too. I replaced the cabin filter with a charcoal type and it did nothing. Dealer says I need an HVAC duct cleaning. Yea, right.
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Old 03-30-2015, 03:45 PM
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Re: Sour smell from air conditioner

Thanks for the replies. I'm going to take it in and let the service department figure it out.
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Old 03-30-2015, 04:13 PM
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Re: Sour smell from air conditioner

Quote:
Originally Posted by lectricman View Post
Mine has the funk smell too. I replaced the cabin filter with a charcoal type and it did nothing. Dealer says I need an HVAC duct cleaning. Yea, right.
The FRAM fresh breeze cabin air filters fit perfectly. Dunno if the '14 and '15 are the same, but the 14 is FRAM CF11183 resh Breeze Cabin Air Filter.

As others have noted, even carbon impregnated filter won't deal with dead kitty cats in the A/C.

I would start with FrigiFresh, where even in Colorado it can stink up since the outside humidity isn't what matters--it is how humid [very] it is in the innards of the A/C.
Apply at least every month or so. And if you replace the filter put a really good dose of it down into the innards with the filter out.

There are treatments that flood the A/C with a cleaning and deodorizing foam, but a good dealer would suggest FrigiFresh first.

You MAY have something in there... if you park under shedding trees or similar and don't carefully clean the underhood intakes for the A/C.
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Old 03-30-2015, 05:45 PM
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Re: Sour smell from air conditioner

Mine has the smell since day one. Especially when I turn the AC on and off. I usually turn off the AC about a mile or so away from home so it dries out.

Not sure what's causing it, but have learnt to live with it. I would be interested in knowing how they fix it.
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Old 03-31-2015, 01:53 PM
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Re: Sour smell from air conditioner

I have an appointment tomorrow morning to get this addressed, fix the rough shifts, and a random rattle from the drivers side dash. I'll let you know how it goes.

We leave the AC/heat on auto so I would expect the design to be able to cope with that.

For the Xterra they just sprayed something (maybe frigifresh mentioned above) into the system. That lasted for a couple of weeks until the wreak returned. We eventually stopped buying Xterras and that was a big part of the decision. Hopefully Jeep has a more permanent solution.
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Old 03-31-2015, 01:55 PM
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Re: Sour smell from air conditioner

Quote:
Originally Posted by Aiyer View Post
Mine has the smell since day one. Especially when I turn the AC on and off. I usually turn off the AC about a mile or so away from home so it dries out.

Not sure what's causing it, but have learnt to live with it. I would be interested in knowing how they fix it.
Just noticed you're in Castle Rock too. It's going to Medved in the morning.
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Old 04-01-2015, 04:51 PM
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Re: Sour smell from air conditioner

Still in service... Manager called to ask about how we run the system and if fresh air is used often. We typically leave the climate control on auto and it almost always shuts off the recirculation. The only time we turn it on is if there's a foul smell outside, which isn't often. Another possible issue they mentioned has to do with coolant reacting with one of the hoses but it sounds like that's far less common. At least I feel they are trying to dig into it.
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Old 04-01-2015, 06:06 PM
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Re: Sour smell from air conditioner

i guess all above are choosing not too listen, their questions are all answered in your post. jeep has obviously rectified the issue with a charcoal filter.

Quote:
Originally Posted by silvermax04 View Post
I had a similar experiance with sour smell. There is a new cabin filter that came out recently for the problem the diesels have with diesel smell inthe cabin. The new cabin filter has charcoal in it,though intended for the diesel it works in any of the GCs. I currently have it in mine. Here is part number 68260792AA
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Old 04-01-2015, 06:10 PM
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Re: Sour smell from air conditioner

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Originally Posted by nicjak View Post
i guess all above are choosing not too listen, their questions are all answered in your post. jeep has obviously rectified the issue with a charcoal filter.
If its either of the issued the service manager mentioned, a charcoal filter addresses the symptom, not the problem.
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Old 04-01-2015, 07:43 PM
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Re: Sour smell from air conditioner

Quote:
Originally Posted by nicjak View Post
i guess all above are choosing not too listen, their questions are all answered in your post. jeep has obviously rectified the issue with a charcoal filter.
Their filter/TSB is BS. It doesn't get rid of the stank. Not to mention that the filter is a one time deal. Jeep seems to not be interested in the cause. Just the cover up.
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