Your A/C Smells Like Mildew or Mold As your vehicle ages, bacteria can grow in the system where moisture typically collects — particularly on the A/C’s evaporator. When this happens, a pungent, mildew-like smell can get blasted into your cabin through your A/C vents.

Other Burning Smells From Your Car Maybe it doesn’t smell like rubber, but you’re almost sure something is burning under the hood. A burning smell in your car could be caused by several things, including a burned-out electrical fuse, an overheating A/C compressor, or worn out brake pads that need to be replaced.

The heater core could be leaking coolant into the heating system or air conditioning system, causing a burning rubber smell. This causes significant coolant loss and also sufficient damage to your car. Solution: Check if your coolant tank has any cracks in it. If coolant is leaking, you may smell a sweet smelling odor.

Step 3Spray Lysol into the Outside Air Vents On the outside of your vehicle at the bottom of the windshield, you’ll see air intake vents. Take the can of Lysol and spray into this vent thoroughly and on both the driver’s and passenger’s side.

Lysol has a high ethanol alcohol concentration, which means it is highly flammable. When you spray this disinfectant into your HVAC system, it could come into contact with the electric motor and create a flash explosion that could damage your home’s ductwork and even create a fire.

Most likely that pee smell is coming from a build-up of mold, mildew and bacteria, or to be technical, the mycotoxins of the mold, on your vehicle’s AC evaporator. The mycotoxins generate ammonium, which urine also happens to contain, and this is what you’re smelling.

If you smell urine coming through your vents, you likely have a pest infestation of some kind. Mice in particular nest in and around equipment and ductwork, and where they nest, they urinate and defecate.

If urine stains are present, clean the area around the vent with a pet urine cleaner (available in pet stores), or a solution of 1 part vinegar and 1 part baking soda. This prevents the animal from continuing to urinate in the vent. To get rat urine smell out of my car, I would use a mixture of white vinegar and water.

Furthermore, why does my car air conditioner smell like ammonia? The smell: A musty, acidic or an ammonia scent Your evaporator coil is the indoor AC unit that actually cools your air. And that musty or ammonia scent? Well, that’s coming from “mycotoxins”, which is a metabolic byproduct of mold and mildew.

Freon travels within a closed system in condenser and evaporator coils and lines. Mostly made from copper, these coils and lines can sometimes crack and result in a refrigerant leak. What does Freon smell like? A freon leak smells like coolant in your car and has a slightly sweet aroma.

A Sweet Air Conditioning Smell A sweet smell coming from the air conditioning unit could indicate an antifreeze leak. Antifreeze contains harsh ingredients that can be toxic in large amounts. It is necessary to find the leak and to correct the problem as soon as possible.

Signs you’re suffering from refrigerant poisoning include:

• Swelling in your throat or sinuses.
• Difficulty breathing.
• Severe pain in your nose, throat, or sinuses.
• Burning sensation on your eyes, nose, ears, lips, or tongue.
• Vision loss.
• Severe stomach pain.
• Vomiting or diarrhea.
• Indigestion or heartburn.

Refrigerant is the lifeblood of your air conditioner. Over time, sometimes these copper coils crack and leak refrigerant. Refrigerant has a sweet, chloroform scent, so that could be the chemical odor you’re smelling. If you do have a refrigerant leak, you’ll notice other signs like…