Are foul odors from your car's
air conditioning system making you sick?

Here's a look at a typical auto A/C system
air flow illustration

Notice that all of the air entering your vehicle from the the fresh air inlet passes over the evaporator first. That is typical in every auto A/C system on the road, regardless of vehicle manufacturer. The auto A/C system is typically called a 'series reheat system' because no matter what temperature setting you call for (hot or cold or somewhere in between) the air must first pass over the A/C evaporator. Then it is directed straight into the car (when you want air conditioning) or it's directed over the heater (when you want heat) or the air is mixed (some from the evaporator and some over the heater) when you want a moderate temperature.

With all the air passing over the evaporator first, it collects all the contamination in the air. That includes bacteria, mold, mildew, spores and anything else. That's why it's important to get the right A/C Evaporator Treatment that will eliminate that odor causing bacteria.

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