I've noticed a problem with the heater on my 2011 caravan. When the heater is off, there are fumes emiting from the heat vents. These cause soreness in the throat. When the heater is seeking the desired heat, everything is fine. Once it hits the desired heat and goes into idle mode for lack of a better term, the same sensation occurs. Has anyone else experienced this?

 

Is it very noticeable? Seems like something I'd have the dealer take a look at if it always happens and is easy to reproduce.

 

Might want to check if your car has a Cabin air filter, and replace it if you do.
How bad is the smell?