The defrost blows cold air but the heat works in vent but as soon as you switch to defrost it turn cold
Jan 3, 2013 at 3:38 PM
2003 Oldsmobile Silhouette Defrost Blows Cold Air Heat Works Vent Soon You
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That sounds like an issue with the control head but it's going to require a very high end scanner to access the info in there.
Jan 3, 2013 at 3:40 PM
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