Q: Heavy toxic smell coming through AC vents

asked by on

Coming from engine area - intermittently I get a heavy toxic smell from the AC vents - what do I do? What is malfunctioning?

My car has 136000 miles.

Hi, thanks for writing in. This may be potentially a smell of AC refrigerant if you have a refrigerant leak. This sometimes happen when there is a leak in the AC refrigerant system. I would recommend having an expert from Your Mechanic come to your home to diagnose and repair this leak as it is very dangerous to inhale.

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. Heavy toxic smell coming through AC vents

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: Q: Battery Light on

Hello! The Battery Light indicates that there is a failure in the charging system. This should be diagnosed and repaired sooner than later, as a failing charging system can leave you stranded. The charging system needs to be tested to...

Q: DPF (Diesel Particulate Filter) melted

Hello. The DPF functions by trapping certain diesel particulates, and periodically goes through a regenerative cycle to burn those particulates (i.e. when you're on the motorway and get the temperature high enough to regenerate). This is a bit speculative, but...

Q: Q: What does the Brake Warning light mean?

The Brake Warning light is located on your instrument panel. When the Brake Warning light is illuminated, then one of two things is happening: 1. The parking brake is currently engaged. If you are driving your vehicle and the Brake...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...