Hello List --- I managed to successfully bypass the heater core on my 65 Crown (for the HOT California summer). It made an immediate difference in the cabin temperature. Also, I noticed that when I engage the "AIR" button (this is not an A/C car) on the control panel I get (surprise) cool, outside air. Before the bypass I would also receive HOT air through the defrost vents; this air is now cool as well. I like this VERY much. My question is this: Do I run the risk of damaging my now-bypassed heater core by running the AIR (vent) system? I definitely want my heater to still work when I reconnect it this winter... As always, thank you for your help! Chris Walter Modesto, CA 1965 Crown __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com