stuck on defrost

[4nak8er]

I have a 97 gt with a 3800 and about 100000 miles on it. My vent is stuck at defrost. How can I fix this? It's getting cold in MI and I would like to warm up my feet. Thanks.

[regalfriend]

Put the car on cruise control and put your feet on top of the dashboard...Only kidding...im not sure of the answer but am sure you will get a good reply

[jrodz]

Originally Posted by 4nak8er

I have a 97 gt with a 3800 and about 100000 miles on it. My vent is stuck at defrost. How can I fix this? It's getting cold in MI and I would like to warm up my feet. Thanks.

I had the same problem and it turn out to be the vaccum hose going to the MAP sensor. If your cruise control doesn't work as well, there's a pretty good chance that the vaccum hose from the MAP sensor came undone, if so, reconnect it. Hope this will solve your problem.

[richtazz]

hey regalfriend, how ironic that your joke would be impossible, as it's most likely a vacuum line has split and/or came off, and the same vacuum line supplies the cruise as well,

[BNaylor]

Originally Posted by richtazz

as it's most likely a vacuum line has split and/or came off, and the same vacuum line supplies the cruise as well,

That's funny, I didn't know the cruise control had a vacuum line feed.

But seriously the one to check is the one that runs from the intake manifold and routes in a round about way near the battery into the big wiring harness that eventually goes into the firewall to feed vacuum to the HVAC system controls.

I worked on a friend's '98 GT a while back and he didn't know that he smashed the accessories vaccum line after a battery swapout. The battery was sitting on top of it.

[richtazz]

oops, my bad. I forgot these cars have an electronic cruise module, not the old school vacuum one. I was so busy making a joke, I didn't check my facts first.

[4nak8er]

Originally Posted by bnaylor3400

That's funny, I didn't know the cruise control had a vacuum line feed.

But seriously the one to check is the one that runs from the intake manifold and routes in a round about way near the battery into the big wiring harness that eventually goes into the firewall to feed vacuum to the HVAC system controls.

I worked on a friend's '98 GT a while back and he didn't know that he smashed the accessories vaccum line after a battery swapout. The battery was sitting on top of it.

Thank you. I must have pulled of the line when I took off the engine cover. It was the small line going from the back side of the manifold around to the fusebox/battery side of the engine compartment. Now I have feet heat.