2004 Lincoln Navigator AC blows intermittently between top vent and face vents
My 2004 Lincoln Navigator has started
blowing between defrost vents and face vents.
When it switches, the air is warm in top, but
cold coming out of face vents. It seems to
switch to defrost when I start going up hill. I
can usually get it to start blowing out of the
face vents by adjusting the fan speed.
The engine has started to sputter every now
and then, and seems to only be with the air
conditioner running. I'm thinking the AC issue
is electrical but not sure if the fuel injectors or
pump is going bad or if it's some how related
to the AC issue. Maybe a vacuum issue? Any
help is greatly appreciated. Thanks