i have a 2001 Montana and when i turn the air on i seem to get a smell threw the vent for the first few seconds. then it goes away. is there something i need to clean out or something to get rid of teh smell? just want to know if there is something i can do first before i take it somewhere.

the drain tube for the heater core and evaporator maybe clogged and not letting water drain out..its simple to fix just use something to clean it out like a pipe cleaner or something small like that.