If an auto air conditioner is run in "Max" or "recirculate" mode too often it will build up a mold that gives off a terrible odor.
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BG Chemicals makes a service kit to clean the evaporator without removing it. Go to bgfindashop.com and they will list repair shops near you that can perform the service.
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BG is a toxic solution. There is new product called DWD2, which has just recently been accredited by the Asthma Foundation, and Repco Australia I believe are about to distribute.
Easy to administer from an aerosol can and catheter, it costs under $100 and takes ten minutes.
It is entirely non-toxic expanding foam that entirely coats the unit, completely destroying all mould, fungus and bacterial growth at the source, rather than masking symptoms with harsh chemicals.
You probably have mold on the evaporator coil.
sounds like your air conditioner compressor is bad.
A smell coming from a reverse cycle air conditioner may be a signal that the filter needs to be cleaned. A smell like engine exhaust might be present if the air conditioner motor is in need of repair.
Bad smells in the aircon is usually caused by bacteria. You can buy special air con sprays that kill off moulds and bacterias making the car smell nice again.
Probably the evaporator core has mould on it and needs to be cleaned.
It is likely germs and fungus in the air conditioner. You can use a spray product to clean it. If the evaporator is leaking you will get a very bad order. You will also start loosing your freon, then no a/c.
It sounds like there is a leak inthe evaporator section of your air conditioner. If this continues, the air conditioner will no longer cool and you may have to replace several components of the system. The smell is that of atomized esther oil.
A bad alternator will cause a battery to go bad. It does not have an effect on the air conditioner.
because you have too many dead babies in your air conditioner tank
An air conditioner should not smell like smoke when turned on (or when turned off). I would have to suspect that the electrical insulation is burning.
The air conditioner or heater continually runs.
clean it, then spray it with air freshener.