In my '90 Imperial, I've been having somewhat related problems with my HVAC. I've been told (haven't had time to verify yet, we'll see how that goes and I'll let you all know) that there's a check valve just inside the engine bay from the firewall on the vacuum line that's probably gone bad. I don't know where yours is to help you there, but perhaps yours is going out as well. -Jason On 8/12/05, Bob Smith <limoguy1950@xxxxxxxxx> wrote: > Wayne: > > Many years ago I was told that this is the "default" position required by > Federal law so that in the event vacuum failed (I presume in the winter) > that air would go to the windshield guaranteeing clear vision. I would look > for a dried out (cracked) vacuum hose in the HVAC circuit. Under the hood > is a good place to start because there is a good deal of heat which can dry > out rubber hoses. > > I don't know if the "default" reason is actually law. It's been maybe 40 > years ago that I heard it but I can tell you that in every car I've ever > owned (other than my manually controlled '65 Tempest), if you remove the > vacuum hose under the hood, that's what happens.] > > Bob Smith > > > Wayne Michaels <baker-michaels@xxxxxxx> wrote: > > Hi, Just recently my AC, under load, has started moving air flow to the > floor and defroster vents. I know from other cars I have that this is > usually a check valve gone bad. Does anyone know if that is also the case in > the 81-83 Imperials? and where might this check valve be located? Could it > have anything to do with the vacuum amplifier out on the engine? Bob > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm