Thanks for the hint Dave, Now a question: If the swich is set for "vent" the heater core should be bypassed correct? The heater core should be "cold" or does it warm up anyway even though the heater valve is in the closed position? Nathan 2277 --- In dmcnews@xxxxxxxxxxxxxxx, "Dave Swingle" <swingle@...> wrote: > > BTDT > > http://www.dmcnews.com/Techsection/heatairleak.htm > > Dave > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/