Skip the auto shop - Our mechanics make house calls

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 1000 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

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: Car smells like very strong gas leaking at the bottom

Hey there, thank you for asking a question about your 2005 Saturn Ion. A "strong" odor of fuel is an emergency circumstance. If you park a vehicle with a known gas leak in a tightly closed space, such as a...

Q: It's run and everything but motors leaks oil I keep putting oil in and it keeps running but what do you think the problem is

Most likely it is a gasket that is leaking. To accurately locate the leak, a visual inspection of the engine is required. Oil leaks can be hard to find, especially if the engine is very dirty. I suggest cleaning the...

Q: What tips should I follow with the air conditioner?

Your car’s air conditioner and heater are largely self-monitoring, but there are a few things that you should know. If the automatic climate control system is operating and it’s very warm, you may notice fog/mist coming from the...

Related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.