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      07-21-2018, 12:42 PM   #1
jkwhar
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AC smell: I may have found an easier way to the evap coil

I've been trying to tackle this issue for awhile. I've been looking and studying at images on eBay/google/etc of the blower motor assembly. The tube under the filter stood out and noticed that it goes to where the AC drain is. So today, I bought a can of AC foam cleaner, stick the tube as far as I can go. Gave it a few minutes and checked underneath the car and its slowly draining down the AC drain tube!

DO THIS AT YOUR OWN RISK!

The blue box I believe is where the AC drain is and the yellow box is the tube to the cabin filter cover.

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Last edited by jkwhar; 07-21-2018 at 12:51 PM.
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      07-21-2018, 03:03 PM   #2
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Quote:
Originally Posted by jkwhar View Post
I've been trying to tackle this issue for awhile. I've been looking and studying at images on eBay/google/etc of the blower motor assembly. The tube under the filter stood out and noticed that it goes to where the AC drain is. So today, I bought a can of AC foam cleaner, stick the tube as far as I can go. Gave it a few minutes and checked underneath the car and its slowly draining down the AC drain tube!

DO THIS AT YOUR OWN RISK!

The blue box I believe is where the AC drain is and the yellow box is the tube to the cabin filter cover.

View post on imgur.com


View post on imgur.com
So you're saying that a possible source of bad smell is from some left over moisture in that drain tube accumulating and it eventually travels inside the cabin?

Can you report if any foul smells are gone or if it smells different?
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      07-21-2018, 03:07 PM   #3
jkwhar
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Quote:
Originally Posted by perryo91 View Post
So you're saying that a possible source of bad smell is from some left over moisture in that drain tube accumulating and it eventually travels inside the cabin?

Can you report if any foul smells are gone or if it smells different?
The drain tube (green) is my way of injecting the AC foam cleaner into where the evap coil is.
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      07-21-2018, 04:00 PM   #4
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Quote:
Originally Posted by jkwhar View Post
The drain tube (green) is my way of injecting the AC foam cleaner into where the evap coil is.
Oooh so you're using the drain tube to go up into the evap coil.

I understand!

Did it help?
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      07-21-2018, 04:01 PM   #5
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Quote:
Originally Posted by perryo91 View Post
Oooh so you're using the drain tube to go up into the evap coil.

I understand!

Did it help?
I haven't drove that car yet today. I'll report back once I do!.
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      07-21-2018, 04:04 PM   #6
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Quote:
Originally Posted by jkwhar View Post
I haven't drove that car yet today. I'll report back once I do!.
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      07-22-2018, 02:45 PM   #7
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Quote:
Originally Posted by perryo91 View Post
I drove the car and the smell is gone!...for now lol. I'm 99% sure the method I used was able to get to the evap. Now it comes down to the choice of foam cleaner I used which was "Lubegard Kool-It Evaporator and Heater Foam Cleaner" (Klima cleaner was sold out at the time of purchase).
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      07-31-2018, 01:55 PM   #8
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Think I am going to give this a try this weekend, that unit looks to be the same as what the F22 uses. I am assuming everything is working as normal and the smell being gone is the only difference?
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      08-03-2018, 07:04 AM   #9
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Update: Went ahead and gave it a go, I also used the lubeguard cleaner. The process is pretty simple, getting the cleaner tube through the opening is not easy and I was only able to get about 5 or so inches of tubing inside it. The cleaner really expands in its volume so I don't think you need to worry about it hitting the evaporator perfectly, the first time I tried the foam came straight out of the opening into the cabin, gave it an adjustment and it seemed to work just fine. I did it in 2 stages because it started to overflow into the cabin, I was watching it drain out at the same time. The diameter of the tubing is very important as anything wider than this product will be incredibly difficult to fit.

When you turn it on you get a pleasant minty smell that is very mild, this did seem to work, I think the biggest question is how long. Klima cleaner has a much bigger bottle and is apparently more potent so that might be a better long term solution.

Here are some crappy pics

This is what overflowed into the cabin, note the nasty color- this was more green than the pics show.

Draining under the car
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      01-02-2019, 08:08 PM   #10
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Lets bring this post back from the dead since there seems to be very little about this topic on the internet.

I found this kit with evaporator cleaner and air intake refresher on Amazon: (NOT AFFILIATE) for like $17
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

It comes with a handy injector tube for the evap cleaner with a cone on the end of it. It is interesting that this part has two drain access points.

Any reason not to plug the interior drain and inject straight into the exterior drain? Typically you are supposed to hold it in there for a few minutes until it liquefies.

Toyota Service video: Can't be that different in our cars.


The main difference seems to be that in the toyota there is no escape for the foam like there is in our cars.
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      01-02-2019, 10:00 PM   #11
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That's how you should do it. The difficult part is that the drain hose is beneath the under body shield, so you have to drop that. It's about ten screws in all. Before dropping the shield run the car with the AC on until you see water dripping under the car. That's condensate coming out of the drain tube. When you drop the shield there will still be enough dripping out the tube to find it, tucked to one side of the drive shaft. This is what I used to clean the coils:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Stick the cleaner injector hose as far up the drain tube as you can, but don't be concerned about getting it all the way up. The cleaner is under pressure, so it will make its way to the coils.
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      01-06-2019, 09:27 PM   #12
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Awesome. Did any of the cleaner get into the cabin?
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      01-06-2019, 09:47 PM   #13
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Not a drop. It did impart a slight lemon scent to the AC output.
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      01-12-2019, 12:39 PM   #14
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Can F30 AC evaporator coil be replaced through the blower unit? Or does it require a dash teardown for R&R?
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      01-12-2019, 02:55 PM   #15
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You have to remove the entire AC unit from the car. It's a major job.
https://www.newtis.info/tisv2/a/en/f...nts/1VnYnp00yo
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      01-13-2019, 03:57 AM   #16
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Quote:
Originally Posted by Billfitz View Post
You have to remove the entire AC unit from the car. It's a major job.
https://www.newtis.info/tisv2/a/en/f...nts/1VnYnp00yo
Oh well, so a dash tear down is needed then. In some Accords/Hondas the evaporators can be removed from under the glove box.


Last edited by bavarianride; 01-13-2019 at 04:03 AM.
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      01-16-2019, 11:08 AM   #17
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ISTA+ I found the BMW procedure and of course it involves a BMW special tool in case anyone is wondering. I plan to shape a wire hanger in that shape using the tube provided with my Subaru AC cleaning kit.
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      02-08-2019, 06:04 PM   #18
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I'm going to ry to clean my evaporator tomorrow. Hope it does the job...
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      02-16-2019, 05:28 PM   #19
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Well I used the BMW method, but without any special tool. I got the hose up and around the bend, and sprayed the can. It came out the drain under the car, so I assume it went to the right place, now to do a couple long drives to see if it worked.
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      02-19-2019, 12:31 PM   #20
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when everyone refers to a bad ac smell do you guys smell antifreeze?
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      02-20-2019, 05:08 PM   #21
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Quote:
Originally Posted by av.cr2 View Post
when everyone refers to a bad ac smell do you guys smell antifreeze?
Somewhere between Antifreeze and Cat pee.


And so far, the smell is almost gone. I think I may do this once again to flush the system some more.

There is no residual chemical smell at all, and after a long drive, no puff of Cat pee when I come to a stop. I think I smell a little residual stink, but I'm really trying to smell it.

Edit: I used nextzett 96110515 Klima-Cleaner Air Conditioner Cleaner
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