Join Date: Sep 2002
Location: Fulltime RVer
Feedback Score: 0 reviews
I'll bet it's blend doors - we've just experience the same thing and had it repaired. And dash removal is required. Just to be sure, turn the fan speed on 2 or 3 bars, turn on ac, roll all windows up, keep all other noise off - radio, nav (if you have one), etc and drive about 25 mph down as smooth of road as you can find. Try to do it at an outside temp that requires it to mix cold and hot air to maintain the set inside temp. You can hear the blend door(s) flapping (clicking?). To me, blend doors and damper are the same thing. David
2001 F250 7.3L PSD Lariat 4x4 Dec 2008
2009 F450 Pickup Lariat Plus w/Nav, 4X4 Off-Road Pkg, Rhino bed liner, 50 gal Transfer Flow fuel tank, 24k Reese Signature Series 5th-wheel hitch.
2011 MS 36RSSB3 w/vanity slide and a nice 4,285 lbs of hitch weight
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