Smelly AC

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Jul 3, 2011 | 11:07 AM

vtraudt

Thread Starter

AudiWorld Senior Member

Joined: Jan 2010

Posts: 1,668

Likes: 16

From: Brighton, MI

Smelly AC

What is causing the smell after running the AC? I noticed on a few of my cars.

I assume some mold/else is building up on external or internal heat exchanger?

Will cleaning help?

If so: what to use and how to do it on a 2.7T AR?

Jul 3, 2011 | 12:31 PM

AllRoadMA

Audiworld Junior Member

Joined: Nov 2008

Posts: 94

Likes: 0

From: Mass

Quote:

Originally Posted by vtraudt

Replace the internal air filter? Just a guess...

Last edited by AllRoadMA; Jul 3, 2011 at 12:40 PM.

Jul 3, 2011 | 02:21 PM

Mr. Timewise

AudiWorld Member

Joined: Sep 2007

Posts: 350

Likes: 1

From: Hawthorn Woods, Illinois USA

Some people spray Lysol into the air intake area after removing the air filter. Audi has a special aerosol for this purpose as it is rather common. Here's a commercial brand specifically designed for the job.

http://www.amazon.com/1Z-einszett-Kl.../dp/B0002Z2MKO

And an Audi bulletin...

http://dejong947.com/audi/tsb/audi.tb.87-05-01.pdf

and the product Audi uses...

http://www.airsept.com/

Jul 3, 2011 | 02:45 PM

vtraudt

Thread Starter

AudiWorld Senior Member

Joined: Jan 2010

Posts: 1,668

Likes: 16

From: Brighton, MI

Quote:

Originally Posted by Mr. Timewise

Some people spray Lysol into the air intake area after removing the air filter.

Just to clarify: cabin air filter/intake, not engine air intake, right?

Jul 5, 2011 | 07:56 AM

Mr. Timewise

AudiWorld Member

Joined: Sep 2007

Posts: 350

Likes: 1

From: Hawthorn Woods, Illinois USA

Oh yes, the air intake for the cabin air, not the engines air intake.

Remove the air filter and run the system at high temperature with the air conditioner off (ECON mode) before spraying anything into the system. This dries out any condensation on the cooling coils

Read and follow the Audi Tech Bulletin even if you're just using Lysol.