Rotten Egg smell from Air Conditioner

[Snicklefritz]

I almost never run recirculation, only outside air. that plus one of the drier climates on earth will never smell musty ac. the only time I shut off outside air is when I am about to enter a dust cloud.

 

[ChaneRZ]

I’ve never run recirculation on every car.

 

[LordKOTL]

Thew only times I run recirc is if I'm driving through an area with a foul stench--like someone hit a skunk, manure factory, etc.