Groverson Posted July 2, 2018 Share Posted July 2, 2018 Today my wifes 2005 Navigator with only 30,000 miles suddenly stopped blowing AC air from the main dash vents up front. Cold air does blow from the top portion of the drivers side main vent and the passengers side main vent but thats more for side widow defrost and is not enough to cool the NAV. I tried all the different modes on the dash controls but nothing seems to open up the blend door to get the air flowing to the main vents. I really dont want to bring it in to Lincoln for a 1000$ repair. I was thinking if there is a way to force the blend door open so cold air will flow? Also, any know where this blend acuator is on my 2005? Appreciate any help you can provide...... Quote Link to comment Share on other sites More sharing options...
fordtech1 Posted July 2, 2018 Share Posted July 2, 2018 For some reason Im blank in my head. But Im almost positive that year Navi is vacuum operated mode doors. There is a main vacuum feed coming from engine going into firewall on passenger side by the battery. Its a small single black nylon house. If they break you will default to defrost. Check that first. Is it 4x4? Does the 4wd work? Quote Link to comment Share on other sites More sharing options...
Groverson Posted July 2, 2018 Author Share Posted July 2, 2018 Interesting. I never thought it would be controlled by vacuum. No its not a 4x4. Ill check it out. Thanks! Quote Link to comment Share on other sites More sharing options...
ice-capades Posted July 2, 2018 Share Posted July 2, 2018 A FWD Navigator? Wow! I didn't think they existed! Quote Link to comment Share on other sites More sharing options...
Groverson Posted July 2, 2018 Author Share Posted July 2, 2018 No my NAV is not 4wd. I checked autozone and the actuator they show for the blend door has an electrical connection. So there wouldn’t be a check valve vacuum line- is this right? Quote Link to comment Share on other sites More sharing options...
fordtech1 Posted July 3, 2018 Share Posted July 3, 2018 Ill have to 100 percent make sure that in 2005 a change wasnt made from 2003. However, On the front ac unit the temperature doors are electric motor driven. The mode door, defrost, floor, vent, are controlled by vacuum actuator. When it looses vacuum, it defaults to defrost. Quote Link to comment Share on other sites More sharing options...
Groverson Posted July 3, 2018 Author Share Posted July 3, 2018 So a leaking vacuum storage reservoir thats under the battery tray is most likely the culprit? Quote Link to comment Share on other sites More sharing options...
fordtech1 Posted July 3, 2018 Share Posted July 3, 2018 So a leaking vacuum storage reservoir thats under the battery tray is most likely the culprit? I doubt its the reservoir itself, its been my experience its the source vacuum line that breaks. However, I have seen battery corrosion eat at the line and reservoir. Follow the lines from the engine to the reservoir and see if you find the problem. Quote Link to comment Share on other sites More sharing options...
Groverson Posted July 3, 2018 Author Share Posted July 3, 2018 Thanks so much for your advice. Nice to have an expert at hand. Quote Link to comment Share on other sites More sharing options...
Groverson Posted July 3, 2018 Author Share Posted July 3, 2018 Your right it was a loose vacuum line from the vacuum reservoir to a metal valve. Hooked it up and now nice cold air blowing. Thanks fordtech1! Quote Link to comment Share on other sites More sharing options...
fordtech1 Posted July 4, 2018 Share Posted July 4, 2018 Hey thats great news. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.