 smelly a/c/heater vents.
Hey all-knowing Yota fans, do you know how i can clean my smelly a/c / heater system without taking apart my a/c lines. You see the previous owner was a bit of a smoker and I'm pretty sure he smoked up the a/c coil. I've eliminated the smell from the cab but when i put on the heater or a/c fan i get a rank odor for the first coupla minutes. I wanna open the box and spray my coils but am not sure i can do w/out disconnecting the lines and losing charge. And where is the a/c condensate drain. Can i just foam up the box inside and let the muck drain out?? Thanks for yer ideas. Jack | 
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