I have a 1989 tempo that suddenly decided to no longer allow air to
come out of the panel vents. I did some troubleshooting, looked up as
much info I could online and in Chilton's, and I'm currently almost to
the point of completely taking the dash off. I'm hoping someone else
with experience can help stop me from spending a whole day attempting
Basically, air will only come out of the Defrost and Floor.
-- If I choose AC/MAX AC/Panel Vents air will come out of the Window
-- If I choose Defrost it will come out of the Window Deforst Vent.
-- If I choose Floor it will come out of the Floor vents.
This happens for both heat and cold.
I have come to the conclusion that it is either a vacuum problem or
somehow related to the vacuum lines.
Behind my glove compartment are 2 vacuum lines, one black and one
white. They are both fastened tightly and do not appear to be
leaking. I have not disconnected one yet as I am unsure of if that
will cause any other problems. Is it safe to remove one of them from
the connector while the car is running?
If there are only two lines, would the Window/Floor switching seem to
indicate that these lines are fine, or could one of them be the
Also, has anyone ever pulled out the heating/ac control unit from the
panel? I have the tools to remove my radio, and the unit has the same
holes. I can pry it out a little with those tools, but I get enough
resistance to be afraid to try to pull it out any farther. Does the
switch (between various degrees of hot/cold) need to come out first,
or is there anything I'll break by pulling this out?
I just want some reassurance that I've tried everything I can before
taking apart the whole dash. Any tips would be appreciated, including
on if it's safe to disconnect one of the 2 vacuum lines behind my
glove compartment while the car is running. I figure I could use my
finger simply to check if any exchange is taking place.