Toyota Repair: Air Condition Camry 96, rotten egg smell, c drain

Question
i own a Camry 96 4 Cylinders im facing Rotten egg smell when i Turn the AC of the Car on for few mintets then it disapears when u drive .

thank you  

Answer
Two possibilities, either a rat or mouse got into the air ducts and died in there or the A/C drain hose is clogged up and the water coming from the evaporator can't drain to the outside and is causing mold inside the ducts, check to see if water is dripping out from the drain hose under the car with the a/c on, it may take about 1/2 hour before the water exits depending on humidity, if you suspect there may be a dead rodent the evaporator assembly may have to be removed and cleaned out.