My heat had gone to the defrost default, only air coming out while in the defrost position. After a few Google searches I determined it was a vac leak, and I was about to start testing all the connections when I saw this:



Sure enough, when I turned it to vent the the vac line started sucking. I must have snapped it when I was doing my ignition.

Off to advance!

 

Nice diagnosis and fix!!

 

Yes if all of your vents go into defrost then you have quite a large leak. Defrost setting has no vacuum on any of the actuators, just like if you blew the resistor pack for the blower and you only have the HI setting.

 

Yea! Works great now. 2" of vac hose slipped over the ends and alls well.