its time to seperate the mopar men from the boys

ok, sorry, left this out a small copper tube runs from the ac dryer itself and is attached to the box under the hood. it has a electric switch on the end 7 inches from the dryer. it is attached to open and close a door on the box, which appears to be a internal air/external air source. maybe like Max air is on todays cars, or maybe let in outside air to keep the coil from freezing over? dont know. it has been hooked(solder) to the unit through the box and there for can not be removed without terminating the switch. dryer can not be removed from box without unattaching the switch tube . stuck at this point. can't take the dryer out to check, without cutting off switch. don't know if switch is necessary. and if not necessary, should that door be open or closed. (could hook up a choke cable to it and do it manually if need be) thats why im looking for info. looked up parts and the dryer does not show that switch.