Defroster stuck on need help

[BB Wolf 63627]

I have a 05 F-250 Harley edition. My defroster is blowing air all the time. Even when I put it on floor or dash it comes out of the defroster. Anyone had this happen to them before? With AC on it puts fog on exterior of windshield. Any help would be appreciated.

Thanks
Bob

[Austin G]

Sounds like a vacuum leak somewhere.

[05harley]

x2 i have the same 05 model but in blue loveit. Mine had the same problem and i have a shot vaccum pump. i found the info for repair on the psn website.go to the tech 6.0 page and there will be a detailed set of instructions with pix.

our vaccum pump is on the passenger side front on top of the fender well. the dealer i took it to said the flapper motor was shot the the dash was tobe removed to rr cost in labor alone was $583.00 thanks for all the people on these forums to help the owners of the powerstroke. good luck Ron

[05harley]

here is the thread: How to: Replace your electric vacuum pump - PowerStrokeNation

[Lbs]

I had the same problem. Open the hood, around the same area as the turbo there's a tiny light grey hose, almost looks like a wire. It comes disconnected a lot, youll see where it needs to slip on at. Just slip it back on and you're good to go. I'd get a picture of it for you but my truck is at the shop right now.

[Lbs]

That hose causes the vaccum leak btw

[BB Wolf 63627]

Thanks for advice I will be looking under the hood on Sunday. This is the advice I was looking for. Working to much now to investigate what is going wrong.

Thanks again

[USAFBowman]

A/C Problem

[Acidsniper]

Yeah that gray hose connects to the valve on the heater line that goes to the heater core. It right on top of the coolant hose that you connect an inline coolant filter to right next to the oil fill cap.

[Pthompson]

Pop the hood and pop the hood and turn on your truck to prestart (glowplugs) go to rght side fender and listen to how long it takes the vacuum pump to shut off. If it takes a min you have a leak. If it doesn't than your flapper under the dash is bad... P.S. you don't have to RR the whole dash. It is a PITA but it can be done. I wish I took pics of when I had to do mine. But If you drop the glove box out and watch as switch through different settings on the A/C you should be able to see wether the servos/ vacuum stuff is working properly. Happened on my truck and my old 02 taurus that I used to have.

Good luck and save up some patience if it's under the dash issue.