Cabin air filter all wet and moldy - Nissan Murano Forum
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post #1 of 5 Old 06-11-2019, 10:03 PM Thread Starter
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Cabin air filter all wet and moldy

Just bought a 2010 Murano LE, and replaced the cabin filter ($7.73 from Amazon with free shipping).

Few feedback on this:

- Cabin filter is in awkward location and is PITA to take out and put back in compare to other cars.
- Had to use a 90 degree hook to snag it out, otherwise my finger kept pushing the filter further in.
- Follow the instruction from one YouTube video, which involved removing the side carpet, which was also PITA to snap back into right place. (LOL)
- Upon reading other threads, removing glove box (vs carpet) is another method???
- One of the thread mentioned that this is a 5 minute job. I'm reasonably handy, but it took me 10-15 minutes (perhaps because it was first time figuring things out)


Filter being very dirty I understand, but why is the filter quite wet?
It this normal for this model?

I've never seen that with Toyotas, older Maximas, and Volkswagens.
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post #2 of 5 Old 06-12-2019, 09:55 PM
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My first thought is maybe the drain for the AC could be plugged. Is the carpet wet at all?
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post #3 of 5 Old 06-13-2019, 08:02 AM
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Check up under the hood under the wiper blades. You have to remove the wipers to remove the plastic cowling cover. Check for debris, leaves, pine needles that will retain moisture.

If you find rodent activity, silicone some window screen over the air box openings.

Check AC drain hose.

Have a good day.
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post #4 of 5 Old 06-13-2019, 11:41 AM
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PaulDay is right on. Be careful with the windshield glass while removing the wipers. It may help to tap on the wiper base to pop each one loose.
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post #5 of 5 Old 06-16-2019, 12:44 AM Thread Starter
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1. Since I can see AC water dripping below the car, at worst, I thought perhaps AC drain was partially blocked and was draining slowly.
But when I pulled out the AC drain host that was just adjacent to the cabin filter housing, no water had accumulated in the AC drain tank and no water came out.
I didn't have compressor handy, so I did use the shop vac (while sealing it tightly) on the AC drain hose and try to suck out anything stuck there.
It appears nothing came up, so I think the drain is good.

2. I trace the drain line, and it appears to go through the firewall, but I can't seem to find the outlet.
Perhaps, I have to remove the cowling as suggested above.

3. After changing the cabin filter, when I turn on the AC, the first 10-20 seconds smells pretty musty, then it seems to clear up after that.
I'll see if I can improvise something to clean the cabin filter housing.
Also, I saw some YouTube videos where they spray Lysol from outside intake while running the AC full blast with windows open.
I'll give that a shot.
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