General QuestionsGeneral questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.
I have had a problem with my cabin air selection. It has been on defrost and will not switch to any other selction. Is the control switch fowled? and how do I test this, Or is it a vacume hose that is faulty and where do I start to look for damage? Or is there another problem with it....
You have a vacuum system leak. Vacuum controls the mixer, and the default position is "defrost". most likely culprit is the hoses to the auto hubs, but it could be any where in the vacuum system.
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Feb 03 6.0 Silver F-250 SD SC XLT long box, 6-spd 3.73ls, Fx4, Stock, Spray-in liner, Contico box.HARPOONED.
Had to purchase a electric vacuum pump (available only at Ford, $136.00) to fix mine. It sits under the hood on the passenger fender. If it's the pump, you should be able to hear it run with the AC Fan on low and the engine off. If not the pump, the posts above are correct, must be a vacuum hose leak.
THe vac pump is runing and when I plug the main suction with my finger the pump shuts down. I played with the 4x4 hoses by plugind them off and the system came back online "heat controls". Then I plug the hoses back in and everything ran fine until i selected the 4x4 then it went back to my defrost. Q: I just did my upper and lower ball joints, and all that jazz. I also changed the vac seals in the hub bodys both sides is there a special way of placing them back toghther my book didn't say to much about them so it was by the seat of my pants.....
__________________ 2000 F350 Crew Cab,80hp Superchip,K&N Filter,Custom 4" exaust,Transmission temp, Boost and EGT Glow Shift Gauges 6 1/2 Pro Comp Lift,315 Toyo M/T skins on American Eagle Rims.
1994 F350 Crew Cab Turbo Diesel,K&N Filter,Boost & Temp Gauge's,4" Custom exaust, 6" Dbs Lift and 315 skins on America Eagle rims,Custom intercooler,Spray in box liner.
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2000 F350 Crew Cab,80hp Superchip,K&N Filter,Custom 4" exaust,Transmission temp, Boost and EGT Glow Shift Gauges 6 1/2 Pro Comp Lift,315 Toyo M/T skins on American Eagle Rims.
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