toneyamurphy Report post Posted January 16, 2016 Toney, Don't use duct tape, get some AC tape. It's the silver stuff that is use in all AC work around plenums. It lasts years before peeling, if ever. Makes sense, I'll do just that. Thanks, Toney Share this post Link to post Share on other sites
lylefikse Report post Posted February 1, 2016 I have had a similar problem that ended up being a vacuum hose that would collapse sometimes and work well other times. Airflow would change from dash to defrost when the hose failed and back again if and when it decided to mess with me again. Nightmare to track down. New hose and the system is working fine. My 12 volt vacuum pump does cycle often and I believe I have a leak somewhere that I have been unable to find yet. I think more new hose may be a good idea. Share this post Link to post Share on other sites
