That about says it. Stinks up my car. No leaks identified anywhere. Been a while since flushing my coolant sytem.

 

Sounds like a leaky heater core. Only real way for coolant to let off into the air passed through the vents.

 

I just had the same problem.Didn't seem to be leaking anywhere but when I took off the lower hush panel...green fluid everywhere.Change it before it turns into a gusher all over your carpeting.Just a matter of time before it happens.

 

Same exact problem. No leaks on the carpet, just a pinhole leak in the heater core. I wasn't sure because the last one in another car burst like a dam. I got a nice surprise last night when I dropped the kick panel.

 

heh mine must of made a pool under that kick panel becaue one day i just noticed the corner of my floor mat was wet, i just simply wiped that off, but became curious as to what made it wet, and well, when i pulled up that mat, i had a nide little green lake waitng for me