Why does my car smell like rotten eggs when I turn on the AC?


Replace the catalytic converter in your vehicle.

If you notice a sulphur or rotten eggs odour in your automobile, it’s likely that you’ll need to get it serviced by a professional. If your catalytic converter emits the smell of sulphur, this usually indicates that there is an issue with it. It is likely that the converter will need to be replaced.


Consequently, why does my car’s air conditioner smell like rotten eggs?

In addition to being the most probable source of the rotten egg stench, the catalytic converter is also a component of the vehicle’s emissions system. A catalytic converter that is faulty or jammed will be unable to effectively handle sulphur gases, resulting in the stench of rotten eggs emanating from your vehicle.


In addition to the aforementioned question, how can I remove the rotten egg smell out of my car?

Instructions on How to Get Rid of the Odor of Rotten Eggs in a Car

Find the source of the odour and eliminate it. Food items might be accidentally tucked away behind vehicle seats and forgotten about.

Dust the floor mats and carpeted surfaces of your vehicle with baking soda before driving. Remove the floor mats and allow them to air out in the sun if necessary.

1 cup vinegar and 3 cups lukewarm water should be combined in a bucket.


Is it harmful to breathe rotten egg scent from an automobile after taking this into consideration?

The Smell of Rotten Eggs Coming From Car Vents The presence of a sulphur gas in your car’s interior might be caused by worn or broken components such as the catalytic converter, fuel filters, or fuel pressure sensors. If left unattended, this odour is not only unpleasant, but it may also be hazardous, as with the other odours we’ve discussed.


What exactly is the odour coming from my air conditioning unit?

When you initially switch on your air conditioner, you may notice a nasty, mouldy stench emanating from it. This is known as dirty sock syndrome. A buildup of mould and germs on your evaporator coil is the source of the problem. This heat, along with dust and moisture in the darkness of your air conditioning unit, creates the ideal environment for dirty sock syndrome to develop.


There were 32 related questions and answers found.


Do you know what it smells like when your catalytic converter is malfunctioning?

Another prevalent odour is that of rotting eggs or decaying meat. Unless you have rotten eggs in your vehicle, this scent is a burning sulphur smell, which is a clear indicator of a problem with your engine’s catalytic converter or damage to the emission control system, both of which are preventable. Alternatively, it might indicate that your engine is operating with a rich air/fuel combination.


What is causing my car’s air conditioning to smell like sewage?

Sewage: Methane is responsible for the foul odour that most sewage pipes emit. A damaged sewage line near the ductwork is the most probable source of methane odours in your house. Methane gas has the potential to penetrate into the system and spread throughout the residence. The gas methane is toxic in high amounts, it is combustible, and it has a very disagreeable odour.


What is it about my automobile that makes it smell like a skunk?

Is it a skunk odour or a rotten egg odour? The latter is derived from sulphur, which is often derived from inexpensive fuel. It may build up in the catalytic converter and be burned off over time.


What does freon have a distinct smell?

AC coolant is typically transported via closed copper coils in an air conditioning unit, however these coils may split and cause an AC coolant leak. A leak of freon will emit a fragrance that is somewhere between sweet and chloroform. Freon spills have the potential to be harmful.


What is it about me that makes me smell rotten?

Called cacosmia, this unpleasant phantom is more prevalent and may be characterised as smelling something that has been burnt or soiled and has gone bad. Olfactory hallucinations may be caused by a variety of common medical diseases, including nasal infections, nasal polyps, and dental difficulties, amongst others.


Is it possible for low oil to generate a burning smell?

If your car smells like acrid smoke or burning oil, it’s time to have it checked out. Additionally, a low oil level might cause harm to the engine. The leak might be caused by a loose drain plug or filter that wasn’t properly attached—or by an oil cap that wasn’t put on securely enough—if you detect the stench right away after an oil change.


Is it possible for a faulty battery to produce a rotten egg smell?

The smell of rotten eggs The stench of rotting eggs is one of the first signs that there is a problem with the battery. Acid lead car batteries are loaded with a solution of water and sulfuric acid, which is a conventional procedure. This may cause the battery to overheat or boil, resulting in an unpleasant odour and, in more severe circumstances, the battery may begin to smoke.


What is the best way to tell whether your catalytic converter is bad?

Engine performance is sluggish as a result of a faulty catalytic converter, among other indications. Acceleration has been reduced. Exhaust smoke that is dark in colour. Emissions from the engine produce a sulphurous or rotten egg stench. Under the car, there is an excessive amount of heat.


How long can I keep driving if my catalytic converter is damaged?

It has the ability to be driven indefinitely. A clogged catalytic converter can only prohibit you from driving your automobile in the most severe circumstances. You should be able to drive your vehicle indefinitely with a partly plugged converter, however you will notice a decrease in overall performance.


The reason why my automobile is shaky and smells like rotten eggs is unclear.

The foul odour you’re referring to is most likely the result of a faulty catalytic converter in your vehicle. An extreme misfire, such as the one you describe, can cause the catalytic converter to degrade, and the car will emit an unpleasant sulphur smell as a consequence of this. Of course, the misfire will cause the Check Engine Light to light as well.


I smell antifreeze, but there is no leak.

THE CULPRIT: A coolant containing the sweet-smelling (but poisonous) ethylene glycol is pouring from an unknown location. There are a variety of causes, including a leaking radiator or heater hose, a blown intake manifold gasket, or an overheated cylinder head. Especially if you smell it outside the vehicle, it might be coming from a leaking radiator cap or perhaps the radiator itself.


What is it about my automobile that makes it smell like a dead animal?

In the case of water intrusion into your automobile, even the slightest whiff of mould or mildew might be a warning that water is seeping into your vehicle. If you notice an unpleasant decaying scent or the smell of deceased animals, it is possible that an animal has built a nest and later died in the heating and air conditioning duct system or on top of the engine.