Ford Super Duty Diesel Vacuum Lines

If your HVAC will only blow on defrost it may be due to a vacuum leak somewhere in the system.
My truck is a 2006 6.0 Diesel, this vacuum layout may be valid on other generations of super duty's but you should do your own research on that.

[@earlyraybonneville1762]

WOW!! GREAT TUTORIAL. Clear, to the point, hit all elements, perfect. This helped me tremendously!!! Thank you!

[@kristianoleme]

Thanks for this video man! This is the video that fixed my AC issue. After replacing the PVA solenoid, and vacuum pump I was scratching my head... Your video pointed out that the hose that goes, that rhymed, to the reservoir might be unhooked... it was... AC back up and running!

[@formula19]

Solid video and clear decisive explanation of the routes and lines.

[@robertbrace1343]

thanks for your video ! even at age 62 we are still learning new things. thanks again.

[@BK-iv2rz]

I'm one of those "I don't usually comment" people and I know this video is 3 years old but this helped me big time with the line routing. Was stumped. Your other videos have helped me a ton also. Giving credit where credit is due and saying thank you.

[@bassfishermanify]

Thank you for the video. It's the only one showing and describing the correct way to connect these lines. It is truly the only ones that helped me. Solved my problem

[@black454ss]

Thanks for posting. Short and to the point. I always wondered what that box was. Never knew it was a vacuum reservoir.

[@dannyshy8343]

Raccoons and mice got under the hood of my 2006 Super Duty diesel and ate up some vacuum lines on the passenger side under the hood by the vacuum canister. I could not figure what went where. This video sure helps. Now maybe my heater selector will work as well as my automatic hubs.

[@williamsomebody7428]

This video and the way it's presented is great, very professional. I never comment on videos but this is so good helped me sort out my hubs and heater on my 2007 6.0 now everything works as it should, Thank you

[@martyknowles1011]

Short, sweet, and to the point. Great job!

[@keithnoneya]

Ford did it that way because when it breaks is far easier to repair than a cable system. It's easier to change out a simple switch or a vacuum line than a cable. It's also easier to engineer and cost less than running cables like it used to be done. When cables are run they have to be built, adjusted and repairs usually require a portion of the dash be removed. A vacuum system is easier to troubleshoot and repair as well, as you did yourself. Although reliability of both is comparable it's easier to run a line than build a whole cable system with plastic levers and brackets that require adjustments. Most of this also applies to the 99-2005 systems as well, with the main difference being the vacuum operated heater valve, those aren't on the 99-2003 Super Duties. But made a nice addition for colder air when installed. Thanks for sharing though. Best Wishes & Blessings. Keith Noneya

[@912cal28son]

Thanks so much for all of the direct isolation of vacuum areas. It does not seem like a monumental task to inspect my vacuum issue.

[@davehubbard6075]

Got to give you a shout out appreciate this video it was exactly what I needed short sweet to the point found the problem got it taken care of...thanks again

[@joshuabrunette3242]

Great Video Thank You, my heat vac line was off. I now have full A/C Thanks Again!

[@sterlingrush7429]

Thank You! Totally diagnosed a loose vacuum line thanks to your video.

[@JackFrost-fx1er]

Excellent explanation and video, crystal clear, thanks!

[@marcchavez6245]

Thanks for taking the time to make the video great video bro thanks again boss

[@christhomas6166]

Great video. Very to the point and explained perfectly. Make some more videos of other 7.3 things.

[@guillermogarcia6342]

Great video man!!!! Totally helped me!!

[@StarJar58]

Thanks, Helped a lot bro with a 2006 450 I bought for hot-shotting. It came with the HVAC unit out, and a tagged used one on the back seat. I see lines coming off the dash selecter switch, but tomarow will try to see why they don't appear in the vent area.

[@dxpvxo711]

Great video. Thanks for making it. Sometimes its hard to find information on some of these little systems. It took me to days to even find out what the vacuum reservoir was. I kept Google things like ovel box next to battery ect. But i eventually found it so thanks. I only have a 2wd so I have a few less hoses on mine

[@vab4131]

great video my truck had the lines disconnected/cut when I got it and I've been hunting down a layout I could understand. Thanks so much

[@SACREDFlRE]

Same here but I can't figure out why. I'm missing the gray wire behind the glove box. Guessing I will have to pull the dash out to fix it...

[@strictlycrucial8046]

Hell yeah, I’m chasing down a leak cause my pump won’t shut off. This vid really pumps my nads

[@Ammo461]

Great detailed video. Thanks!

[@mharrye]

Very helpful. My vacuum pump had failed, possibly because there is a vacuum leak. Replaced the failed pump, still no help, then noticed the hose from the reservoir to the pump had been chewed through by a rodent. This tells me I have a lot more to check because rodent nests removed from the engine compartment are sickening.

[@renohuskerdu4592]

Mine is 2wd so only one circuit to diagnose. The pump was running full-time. AC stuck on defrost. Turned out to be the vacuum hose connections behind the glove box. Big old feet guy had been sitting there last night.

[@charleskelley9430]

Thank you for the helpful information

[@Believer21777]

Thank you Thank you Quick to the point very good information

[@francishartman7749]

Great video, thanks.

[@ostapbender952]

Thanks my friend ver nice explanation

[@rainbowrj]

Thank you for this video. My '03 Excursion 6.0 had quit blowing air anywhere but at the windshield (defrost mode) When I looked behind the glove box, I saw the metal shaft of the diverter device, and sprayed both ends with wd-40. The diverter immediately began to work again. Close to 200,000 miles when it started not working. I am thinking lint etc. Thank you!

[@jimmymontes7426]

Helpful video Thank you

[@richardmckibben2384]

Dude I'm working on 2008 6.4 king ranch the vacuum reservoir is part of the battery box you can access with the drivers head light out of the way

[@owlclaw]

Ahhh thank goodness you can see the lines from the glove box!! Fffeeewww.... my leak is so small, this auta be fun.

[@robertodebeers2551]

Good job.

[@sergioplascencia2834]

I have a 06 6.0 ford my vacuum pump works and my hvac works also the hose that goes to the heater core actuator doesnt feel like its working. But other than that it runs fine and blows cold air when selected on cold and throws hot air when selected to hot

[@alexanderlutz5132]

That has been a great help with my project, thank you!

[@patricktravica3335]

Hey man great video. Really helped me out. I was replacing the PVHS because I thought it was bad and while I was removing the two vacuum lines, I accidentally cracked the red line. Do you know the best way to fix it or if there is a part number I can use to replace it?

[@thomasdougherty805]

If you follow the black output line there is a second line lower that runs across the front cross member. Where does the second line go ? Mine isn’t connected and you can hear the air leak.

[@johnnyohness6610]

That's my exact problem with a 1994 F250 diesel. 2 wheel drive. wondering where that vacuum egr solenoid is located. same AC problem all air goes to defrost .

[@xloscarlx]

Where does the black vac line from behind glove box connect to in engine bay, my 05 f350 only has whit and grey from the vac connector right behind glove box but has all 6 between the connector and the Manifold for the eatc.

[@Fordsuperduty6]

Mine works great until I'm on a long drive and then about 2 hours into the drive it trys to switch to the defrost if I unplug the black white and I plug the blue red yellow into the black white then it goes back to working for a little while and then stops again. Did you have to replace the vacuum control that the blue yellow red connects to?

[@ignaciocruz9689]

What if I only have to lines on the glove box?

[@brandonhebert5485]

Unfortunately I had a rat that ate my vacuum lines for my truck. Nobody seems to be able to tell me where these lines enter the firewall. All I see are the nubs at each connector where my vacuum lines used to be. So they might be rare to fail, but if you get a rat under your hood, they fail quite readily.

[@knockout818]

Why did you replace the pump? Was it not operating at all? Thanks

[@steventhorkelsen6478]

Where would I buy some replacement vaccume line for the grey line with the coolent valve? Mine is brittle.

[@glamisfanatic]

so i have been having my AC only coming out the defrost. I tried trouble shooting the 4x4 hub line and it made no difference. I ended up directly connecting the pump to the HVAC line going into the cap and still nothing....What could be the issue? I looked at the vac lines behind the glove box and they all look intact and connected. When I manually actuate the floor vents i get air through there.

[@Artr543]

so interesting

[@elhiezenberg8393]

What if I unplug my hvac line and no air is blowing?

[@Samy_6point0]

Do you happen to have the link?? Thanks

[@Mark_Tschetter]

How much vacuum does this pump make?

[@sonnymodic4967]

Why does vacuum stay running

[@Raptor700Williams]

I had a rat get in under the dash and can’t find out where the colored ones go to would be helpful

[@Str8upRippin10]

Where is the brake booster vacuum hose?

[@joshuaboozer2009]

Hey boss, I've watched a few of your videos. I'm new to diesel engines, just bought a 04 excursion. Doing my research and wondering if you would be up for a under the hood tour so to speak. I have looked around trying to find info on this but cant bring myself to watch anymore 18 year olds that have no mechanical ability make another video about what they did to there dads old truck 😂.

[@CtrlAltDefeatTV]

Sure, I can make a video explaining what's going on under the hood, once i get back to my truck

[@elgrege]

I am having this problem with my 99 7.3 . the vacuum pump does not work unless I take the hose off. the one that goes to the reservoir from pump. if I let that hose unplugged the ac control will work normal. do you think it's the reservoir tank or pump? if you could help thanks on advance

[@CtrlAltDefeatTV]

With the vacuum pump removed from the system your HVAC system works normally? I find that pretty odd, if the vacuum pump is removed then your HVAC system should default to defrost mode and it won't change to any other blower position.

[@renohuskerdu4592]

@@CtrlAltDefeatTV Aaaaaand, he never came back ...

[@brandonhill794]

I only have black and white wires under dash and i cant get defrost to work but regular vents work 🤔🤔

[@Fordsuperduty6]

Did you get yours fixed?

[@brandonhill794]

@@Fordsuperduty6 yes i found out that the guy before me had zip tied the bottom vent door to stay on the regualr vents and not switch to defrost i took off the zip tie and put new vacuum pump on and now it switches properly

[@SACREDFlRE]

@@brandonhill794 did you have to install the gray wire?

[@rogeliovazquez686]

🎉🎉🎉🎉🎉

[@jseb4025]

In the future add the motor to the video

[@LemonySnicket-EUC]

It's a 6.0 . It's in the description.

[@ramdaddy8557]

Mine are busted need new ones