The rotten smell comes from the cabin air filter. i have the same smell and it is on my list to get my 2000 v-6 sonata back up to par.
The smell is similar to the smell of hydrogen sulfide (rotten eggs).
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.
Presence of sulphur.
it is so coz particles in air are constantly moving
sounds like your A.C. compressor clutch is locking up
A rotten egg odor may indicate a dead rodent or animal in or near the ventilation system, whether in a house or car.
Stinky and Rotten Food,Stinky Air and Bad Water.
Unknown to me what 'my? Sonata 2005?' is or means, but the smell may come from the chemical Hydrogen sulfide, chemically symbolised as H2S.It is a very poisonous gas that knocks out the nose's ability to detect it after the first sniff. If you smell it (rotten eggs or cesspool) get instantly fresh air.
because you have too many dead babies in your air conditioner tank
poop
Abosolutley Not!! If you would like to test... Smell yourself, you are made of carbon too!!
When the heater core leaks antifreeze into the heater unit it will smell sickly sweet. you may have or had a leak. --- I work with body shops a lot, and a customer had this exact problem. It turned out a baby duck had crawled up inside the wheel well and died in a small crevice that lead into the vehicle and was not easily accessed. When they got into the vehicle they could smell it, it was sickly sweet (I smelled it myself) and reminded me of rotting fruit as well. When they turned the vehicle on and the air conditioner cooled the vehicle the smell would go away. The smell got worse the further into summer they got as the heat outside was worsening the decomposition. You may want to have a shop take a good look around the vehicle to rule this out!