Does freon have a smell?
Freon, DuPont R22 (Dichlorodifluoromethane) is described in the
MSDS as having a "slight ethereal" odor. I cannot say that I have
noticed any odor from any systems that I have accidentally dumped.
Then, again, I don't stick around to sniff it and I have never
dumped a system in an enclosed space.
If you have ever smelled chloroform, it is also described as
having an "ethereal" odor. It is best not to sniff that either.