Q: Death in the A/C

asked by on

A few days ago I turned my car on and there was a loud rattling sound in the engine for a while. It eventually stopped but the next day when i turned it on, there was a death-like smell coming out of the air vents. Once I realized the smell and sound was coming from the vents I turned it off. The smell is only evident when the ac is on. I am sure it's something worse than regular grime or mildew, and I would like to figure out how to solve this issue and if possible do it myself.
My car has an automatic transmission.

Hello, thanks for writing in about your Audi A6 Quattro. You should remove the A/C blower motor and see if a mouse or rat got into the A/C system if the smell is as bad as you’re describing. They can sometimes get into the system and they are killed by the blower motor. If this happens there’s usually a loud noise followed by a smell. If you need help with this, consider YourMechanic, as a certified technician can come to your home or office to diagnose the smell for an accurate fix.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Death in the A/C

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Funny rotten egg smell inside the car.

This may be related to the inside cabin filter. As you may know, your car has a cabin filter that works much like the engine air filter for your car does. As the air vents circulate air in from the...

Q: My truck spits, chugs and dies when accelerating

It sounds like you may have a fuel pressure problem or a problem getting enough fuel through to the carburetor (judging by the year, assuming it is a carburetor motor). You may also want to check the distributor advance as...

Q: AC not working

The most often cause of the AC not working on a car is low refrigerant. The system is a sealed system, meaning that if the system is low it's because you have a leak. Leaks can come from a simple...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.