Why does my AC smell like rotten eggs?

Why does my AC smell like rotten eggs? Welcome to Mercie J, where compassion and craftsmanship come together. I'm Rick Smith, master technician.

I got to tell you when that question popped up I found it a little odd because typically when we have concerns about smell from the air conditioning, we will either have a like dirty sock (athletic department) type smell and that is usually some mold or bacteria build up because of the heat.

Otherwise we could have more of a sweet smell and that typically is cuz we have a leak from the heater core and we're getting engine coolant inside the vehicle. So the rotten egg smell typically would be more like something from the exhaust or something so I would recommend that you first of all make sure you can determine where the odor is coming from. Is it coming from outside of the car and being brought into the cabin or is it something from inside.

So maybe your kids left some rotten eggs underneath the seats, I don't know. but typically a rotten egg smell is not from the air conditioning. It's typically from the exhaust due to an engine performance problems. I hope this has been information to you and until next time, safe travels and blessings to you.