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Ford ExpeditionTrue expeditions require additional transportation conveyances: horses, boats, cars, for example. With a towing capacity around 9,000 pounds, the Ford Expedition can tow any of these. Ford adds a new top end King Ranch model for 2008, as well as an available rear backup camera and power-retractable running boards. The Expedition is meant for utility, not posing.
Me three.
My 2003 Exp XLT will only blow from Max setting until we get up to 20mph, then it all seems to go into the dashboard.
Alternately, in regular mode, it does it after it has been running a while.
It's like the trap door in their has slipped shut and the air just trickles out the vents, albeit cold.
There are two vacuum motors that control where the air goes. There's one that diverts air to either the panel vents or defroster. The other one sends air up to the first motor, or closes off that duct and forces the air down to the floor.
So, either the 2nd vacuum motor is dead and defaulting with the floor vent closed, or you have a vacuum leak.
Check out the plastic tubing and the vacuum motors. Use a hand vacuum pump and apply vacuum and see if it holds it. Also, check the condition of the A/C function switch. That's what switches the vacuum to the different lines.
Pain to check, but cheap to fix.
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2002 expy a/c problem 
Linear Mode
