If your vehicle’s air conditioning system is not performing correctly it can cause a build up of fungus, bacteria and other microbes on the inside of the evaporator core, causing a smell, sometimes an allergic reaction and can lead to legionnaire’s disease.
It is recommended that you have your car air con system serviced every 18 months. This will be stated in your car manufacturers service guide, yet when your car is serviced, your Air Conditioning system is never serviced. It’s an extra, chargeable item, but vital to have done.