For drivers, having an air conditioning system in their vehicle that doesn't produce cool air during the spring and summer months is unpleasant. Even more frustrating is turning on the A/C and discovering that it's emitting an unpleasant odor, which of course could indicate problems.
What causes the unpleasant smell of A/C?
Before you try to get rid of the smell coming from your car's A/C unit, it's worth understanding why it's happening, as different scents indicate different issues.
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The appearance of musty and damp odors is common, especially in areas with high humidity. This is usually due to moisture accumulating in the A/C evaporator over time, leading to the growth of bacteria. Dust buildup can also clog the evaporator and cause mold. Similarly, a vinegar-like odor can also indicate the presence of mold, but other potential problems include leaks from the battery , coolant leaks, or high ozone emissions.
How to fix your car's A/C when it smells bad yourself
You will first need to purchase a new cabin filter for your car, if it already has one. You will also need a can of disinfectant spray specifically designed for car air conditioning systems, which you can find at most auto parts stores. With all the necessary materials in hand, follow these steps:
- Start your engine and open the windows to avoid inhaling substances.
- Turn off the A/C, set the temperature to the lowest possible level, and turn on the ventilation mode.
- Turn on the fan for a few minutes to help dry out the moisture.
- Leave the engine running, select the Heat mode , and increase the fan speed to maximum for a few minutes
- Remove your car's cabin filter, if applicable, possibly with the help of a mechanic. The process will be difficult to complete successfully without removing it.
- Turn on the fan to the highest setting along with the A/C and observe for any odors.
- Locate the air intakes by placing a sheet of paper or your hands over the corresponding grilles. You will likely find them either at the base of the windshield on the outside or under the hood.
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- Apply the disinfectant to the air intakes, keeping it active for about 30 seconds, while keeping the A/C running.
If the unpleasant odor persists, this may indicate the need for more thorough cleaning and you may need to visit a mechanic.
Source: slashgear
