Why Does My Car AC Smell Like Pee?

The ammonia present in the urine is responsible for the production of a foul smell. We sometimes observe the same ammonia smell from the air conditioner of the car. However, it does not mean that someone relieves themselves there. It is because of mould present in the vehicle. These moulds are more toxic than regular strains of mould; therefore, it’s essential to get rid of such unpleasant smells from your car. Also, we would suggest you keep knowledge regarding the causes of why does my car AC smell like pee.

The foul smell in the car irritates a lot, whatsoever is the reason, but we must cure it as quickly as possible. These smells are not suitable for our health also, so we need to perform regular maintenance services over the vehicle to avoid these rough conditions. So, for now, let’s begin with the topic, discuss in brief the cause and fixation of the problem.

Why Does My Car AC Smell Like Pee?

Whenever we face any issue regarding the vehicle or any other case, the first instinct is to solve the issue. But for this, we need to know the cause to act accordingly and solve the problem quickly.

So, here are some common causes that result in the generation of the problem.

1. Mildew

It is one of the common reasons responsible for producing a smell like ammonia in the car. It regarded as a mouldy odour generated because of the mildew or fungus growing somewhere in the vehicle, more commonly near the air conditioner.

As we know, the air conditioner function to remove excess moisture from the atmosphere. Therefore it absorbs the moisture from fungus, too, generating a foul smell like pee.

2. Bacteria

The bacteria are also responsible for the generation of these foul ammonia like smells. There are a variety of bacteria that creates the pee, like the smell in the vehicle. The most common one is mycotoxins. Therefore, we must take care of our car to prevent such issues.

Hence, proper maintenance and regular servicing of the vehicle is necessary.

3. Dirty Socks And Cat Pee

The stinky feet, dirty socks, cheese, and cat pee are also foul problems. It is generally the result of periodic maintenance that allows both dust and dirt to enter the vehicles. Thus, build-up and promotes the growth of mould inside the car.

Also, the old, dirty water or the clogged air filters may be the culprit for growing over the evaporator coils. Hence, the whole unit needs thorough cleaning to get rid of this peeing smell from the vehicle.

Sometimes, the straightforward answer to most issues lies in itself. Thus, it would be best to search for a cat near your air conditioner; a sit is possible the smell, in reality, is of actual cat pee. Therefore, it is good to consider all the options before taking the final step as this would save us from future danger.

How To Get Rid Of Peeing Smell Naturally?

There are specific ways that you could apply in your vehicle to get rid of the ammonia smell. All these are DIY (do it yourself), or more appropriately, we may naturally remove peeing smell in the car.

First of all, mix the three by the fourth cup of three per cent hydrogen peroxide with one tablespoon of dishwashing liquid in a bottle. It is better if you please consider a spray bottle for the purpose as this would quickly help you distribute the liquid all over the car. At last, spray it down the air vent until half the bottle is empty.

The second method involves mixing a cup of vinegar with a cup of water in a spray bottle. Next, mist the carpet with the solution and blot the area with a clean cloth. Now, allow it to dry for some time and wait for few minutes. At last, sprinkle baking soda over the place and leave it overnight. The next day, you will observe change, and all peeing smell has vanished from the vehicle.

How To Fix The Issue?

Fixing the issue related to the smell is not a big deal. You only need to sure that the leading cause is mould. If so, then you can apply the following methods to solve the problem.

1. Drain Condenser

The first thing you need to ensure is that there should not lie any dirt or debris in the air conditioner’s drain line. In simple words, no blockage should present in the drain line.

For this, you require to park your car idle by switching on the air conditioner. After some time, approximately five to ten minutes, look under the vehicle. Then check whether the water is dripping from the condenser or not in the car.

If yes, then the drain line is perfect, but you need to unplug the drain from the air conditioning unit.

2. Turn On The Air Conditioner In The Car

In these cases, you can turn on the car and switch on the air conditioner. Simultaneously, open all the vents and turn the fan to the highest settings. Also, open your vehicle’s window.

3. Spray Lysol Into Air Intake Vents

At the bottom of the car’s windshield, a vent presently called an air intake vent. These vents spray the whole can of Lysol at the passenger and driver side while the air conditioner runs. Let your car run for at least ten minutes after spraying.


Fortunately, the problem is pretty simple and relatively easy to fix. Also, you do need to visit the mechanic for such cases. However, it is better that you go through the timely services meant for vehicles as these maintenance services help to prevent the car from stuck in unstable situations.

We hope all the readers have found the answer to why does my car AC smell like pee. If still your doubts or queries persist, then comment below in the comment section. And we will surely answer all your questions as quickly as possible.