So you finally gave in and turned on the A/C,
but the smell is unbearable.
What is that smell?
Did something die in the vents?
Now that you think about it, it reminds you of being in the gym when you were a kid!
Smells like dirty stinky socks!
In the HVAC Business it is referred to as
Dirty Sock Syndrome (DSS)
WHAT IS DSS?
Dirty sock syndrome is the foul, moldy smelling odor that comes from your air conditioner when you first turn it on. It is caused by the build up of mold and bacteria on your evaporator coil. Mold and mildew can grow due to the moisture that builds up on your coil through continued use, is fueled by the dust that collects in your air conditioner over time from inadequate filtration and is especially common when your unit goes from a period of heating to cooling.