Ford F-250 stuck in defrost, problem solved
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- Опубликовано: 4 фев 2014
- Air conditioning flow control, often fails on higher mile Ford trucks that use electric vacuum pumps that create suction. The suction system not only controls air zone valves, but also 4X4 activation. Typical vacuum leaks, like old lines are often the problem, but there is one last component that everyone participating on automotive help forums fails to mention when troubleshooting this trouble prone system, the electric vacuum solenoid valve.
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This is the ideal RUclips video. Short and to the point but includes everything you need to diagnose and solve the problem. Thank you for posting it.
9 years later and you're still saving people. This kept me from spending hours chasing a vacuum leak that didn't exist. Thank you!
Amazing how many of these have failed. I moved along to a Nissan Titan XD pro over 6 years ago, but still miss my F-250. You'll never guess what component fails on the Titan. An electronic air mix valve solenoid. Very similar symptoms, but a totally different design concept. Proof newer isn't always "better". Somewhere between now and air conditioning season, I'll be climbing under the dash and changing at least one of those (also well documented frequent failure) parts out.
This gentleman should get the noble peace prize! Thanks you saved me time and $$
Thank you very much , you've been great help.
It may have been mentioned previously but the part number is as follows: Ford Motorcraft # 7C3Z-9H465-A Auto Lock Locking Hub Vacuum Control Valve/Solenoid. This part fixed my 07 F350 6.0L 4x4 exactly the way it fixed the issue for the Yankee Paramotor. Thanks Again!
You are what hero’s are made of, sir. I find comfort in seeing how many views this video has and that I haven’t suffered alone (for years).
Can't thank you enough! Fixed auto hub locks AND the AC on my 2003 F250. Gave you credit in my Amazon review of the replacement part.
Thanks for the video, my 2002 f250 has been stuck on defrost for 3 years and the auto 4 wheel drive has never worked since I bought the truck new, I always had to lock the hubs manually. After watching your video I called the ford garage and they quoted me $321 for the solenoid and a new vacuum pump. I got them on line at am autoparts delivered for $91, just put them both on and I now have cold ac coming out the dash vents and the 4wd locks in without having to get out and lock the hubs. Thanks again for posting your video.
VERY HELPFUL! THANK YOU!
It's not an EGR valve though it's a pulse vacuum actuator for the four wheel drive that runs off the electric vacuum pump. I was told by multiple mechanics that it would not solve the problem. It did! Thank you again!
People putting this stuff on RUclips has safe us a lot of grief. Thank you for posting this, my truck has been in this mode for about 3 months and I'm in 107° heat right now which has motivated me to look in to this to stop the madness.
thank you for sharing, after 4 yrs of owning my truck, I can now fix the issue.
My Ranger is starting to develop this problem. My immediate thought (because it would skip between front and defrost randomly) was some sort of relay/solenoid issue. Thanks for confirming this.
Thank you! Thank you! We are beginning to have the problem. Really appreciate your effort to put this information out in a way that is easy to understand.
I don't understand how this is still not mentioned to this day on forums.. thank you for this video
Dear Yankee in SC
Thank you, you saved me a ton of money and time. I was about to tear the dash apart, and the front hubs. Ford stock prices must have gone down since you posted this!
Awesome video. I have a 2003 F250 and thanks to you I fixed my same issue. Replaced the vacuum pump and probably didn’t need too. For other people the part is Dorman 600-402 $62 at autozone. Thanks again.
Thank you for posting this video! Changed out the part just like you did and my air is now working like it is supposed to. Again...Thank you for posting this video.. It definitely saved me much time and money fixing my air flow problem.
Thank you for posting this video, I can't thank you enough. 2002 Ford Excursion with 7.3l diesel, the part is a DORMAN 600-402 Four Wheel Drive Hub Locking Solenoid - $27 on Amazon, took 5 minutes to fix.
Watched your video after trying to figure it out, went and bought the part you mentioned and problem solved.. thank you very much for sharing this video you've saved us all a bunch of money and frustration.
Thank you for paying it forward! You are helping more people than you can imagine!
agree! Making the DIY world better IMO
Thanks for the post, I appreciate how you covered all your troubleshooting points. I will start with change the vacuum solenoid, and work my way from there. Hopefully, the solenoid will be the fix.
DUDE ! Your the man. I checked all the soft lines and checked the disconnect under hood to defroster, ( mine was working but had to turn placement button to get it out of defrost) All was good, but pump would NOT shut off, been that way for years. Manual 4x4 only. I finally found the disconnect for them next to reservoir, no vacuum. So this module can work on one side and not the other. THANK YOU !!!!!!!!!!!
@Yankee Paramotor you nailed this. My Vac valve failed on my 2000 F350 7.3.
Some additional info - This valve is responsible for controlling factory style auto engage 4x4 hubs and the AC vent system. If you have converted the factory hubs to a manual-only style like Mile Marker or Warn lockouts, you do not need this valve to engage your 4x4. When this valve fails, unplug the vacuum connector on the solenoid valve with 2 ports and plug both ports with an appropriate sized bolt. The red vac line is the one responsible for switching the HVAC vents. With this plugged, you will no longer have a vac leak and your AC/Heat vents should now switch.
Thank you thank you thank you!
I've been living with it for 3 years. Today is 83 and humid. My wife isn't whining at me to fix it anymore!!
Happy wife...happy life.
@@YankeeinSC1 haha, so very true!
"Hey Pilate, that is truth!"
I just replaced my vacuum pump to no avail on my 04F350 w/325K miles. It is a performance work truck. I had vacuum going into the 4wd valve but no vacuum on the line out. My conclusion is the valve is bad & will replace tomorrow. I don't mind paying state taxes but I resent the hell out of paying
$60K for a truck I bought new in 04 for $40K. I have out new heads and rebuilt the upper end @ 250k miles. Put in a livewire tuner & it runs like a champ. Went off road in AZ&UT last two years and tow 5k trailers w/generators and fuel transfer tank! Thanks for the insight! May your day be pleasant and your cab warm/cold as needed!
My 16 year old son is very happy we stumbled across your video here. I saw this video and ordered that part first. Works like a champ.
Sown him the paramotoring videos too, it may just change the trajectory of his entire life!
So for about 2 weeks I've been rolling around with this problem and I just stopped hotter than heck here in East Tennessee. And I was like I've got to figure out what's wrong first video I watched was yours. I was sitting in a parking lot jumped out tap the little thing and all of a sudden the air started working like it's supposed to. Thank you sir
I never sign in to leave a comment, but I had to so I could say thanks a million it fixed my 02 along with a new vacuum pump. I didn't have a clue where to start thanks again!!!
Thank you. I went the whole summer with AC/blower stuck on defrost. Now that winter is coming I'm psyched that the heat will now blow on my feet. You're the best. $30 and your video saved me a bunch of time and money, took five minutes to install.
You could alway become a $1/month supporter... www.patreon.com/ToddFalstad
Seriously glad it worked for ya!
I had a very similar problem with my 2005 F250. The last part this gentleman mention was the Vacuum EGR Selenoid. In fact that was the reason my a/c and such defaulted to the defrost vents. As is turned out, a pesky squirrel had made her nest next to the EGR unit and chewed through the wires! Rascally Wrabbit!!!!
Wow, I just had this problem the beginning of this week! Air/ AC, ect. only blowing out of the defrost panel.... I'm going to buy this part and see what happens. Most likely you're right because it sounds exactly like my problem! Thank you for RUclips, and you Yankee!! Thanks for being a Yankee by the way!!! Much Love!!! :-) Mike Keep that truck running!!!
thanks for the video. I had the same problem and I replaced that part and ran new lines to the hubs and everything went back to the way it was supposed too.
Amen. Saved me untold frustration. This is RUclips at its best. Thanks for taking the time and trouble to share.
Michael Otte Dude. Subscribe.
Thank you sir! This was exactly the problem with my 2003 F-250 Super Duty and your video was spot on.
You were 100% correct!! 10 minute fix.... saved me hundreds of dollars!! Thank you for posting this video.... it's more than just a time and money saver.... it's a blessing!! God Bless You!!
Joel Anderson so? subscribe!
Thank you Brother!! i been dealing with it for a year now and couldnt find nothing online about it till now,Good Man! Thanks for sharing..
After a crash course with the HVAC & 4x4 in my ''02 Diesel Excursion and only having defrost for a year I stumbled on your video after watching who knows how many (along with several auto part stores that said it HAD to be a vacuum leak in the cab) and ordered one off Amazon for $30 and BOOM! Got heat & A/C out the vents. Hats off to ya...
Dan Alberty Hey Dan, does your Excursion have the knob style or electronic push button style for the control settings? Jw. I'm going to try this with my push button style and hope this fixes it.
Hey changed out my Solenoid first and fixed both my 4x4 and my AC flow issue! Thanks for posting
Thanks is so much for the Post....That did the trick. The Part was $39.00 + shipping
Thanks again
Thank you so much for this, I had the same exact problem my 4x4 wasn't working nothing was that required the vacuum but thank you so much for this video helped so much
Thank you , sir .
I took mine off , open it , banged it around a bit and removed any loose dirt and sand , then hit it with some spray can lube , pumped it with air , made a little plastic disk for one side then it worked.
I would have never guessed that part.
Tnks Men ! You save my life it's 106 Fahrenheit ! It was the T connection line to the pump that you show.👌👍👌
(2000 excursion 7.3 diesel) This video was a life saver!! I went through all of my vacuum lines and checked the vacuum pump and thought I was loosing my mind because everything was fine. Sure as hell I replaced the 4wd actuator and it fixed my problem!! Thanks for the help man!!
Do you happen to know the part number? I am having a hard time finding it. I have a 2001 7.3 excursion. Thanks!!
I unfortunately threw the box out but I went down to O’Reilly s and asked for the “4wd actuator” and they had it in stock. I will call tommrow and see if I can get you a part number
Hey so I called and the part number is 600-402 at O’Reilly auto parts
Thanks for the information. The reason I am here is that mine on a rare occasion will default to defrost and seems stuck. Then it may work great for months. Then hang ups briefly and ok again for months. I'm just looking around to see what's up for the time I'm sure will come. Total failure. Now after yours and a couple other videos, I have a pretty clear understanding of this system. I appreciate it.
I had no idea where to start or how, this saved
me endless aggravation! I can’t imagine I
would have ever figured that out. I took
it out, tested the solenoids, and only one picked. I was able to find it at Auto Zone and all
fixed. I got the wrong one at first, the
correct one had to do with the front hubs (glad your video had that
reference).
cool!
You saved me a lot of time and money thank you buddy!
Thank you this was the fix for my 2001 F250 4WD v10 - my problem started during the summer when I noticed cruising down the high way the A/C was only coming out the defrost, oddly when I came to a stop I noticed it would go back to the vents. This when on for a while until the winter where now it would only blow out the defrost vent. I found this video most helpful, as all the options were covered. I first looked for the vaccume leak that led me to brittle hoses down to the hubs they were bad, i never even knew I had them, I replaced and like the video said it worked for a bit again but only at standstill when RMPs got high or on the road it would go back to defrost vents, when I replaced the vacuum solenoid it now all works. I got the one on Amazon for 40 bucks, mixed reviews but the OEM is 90. Will see...tried to buy at autozone they tried selling me a door actuator for the vent...and argued with me i was buying the wrong part...left ordered amazon had it next day...working fine...nice and toasty out the vents. Thanks again
+Erik Renninger It has been 2 full years since I had posted this video. I am still amazed at just how many people have had these simple components wear out and stop working, yet the misunderstanding of how to fix it continues at parts houses, repair businesses and amongst mechanics - even at dealerships. Glad it's working for you again. Thanks for the feedback!
Truck is now fixed thanks to you. I like your style = great info and quick to the point.
Glad it helped!
After seeing this I figured that must be my problem. There's a great old school mechanic here that's great at getting things to work without having to always get new parts. He told me to hit it with a hammer. Sometimes they just get stuck. I hit it, and it started working perfectly. I went ahead and ordered a new one though.
Just hit with a hammer and it started working lol
Haha as if!! I just hit mine with a hammer and it actually worked! Thanks man
Roy Morton
If it still don't work, get a bigger hammer
Just did this too and it worked lmao thank you!!
I
thank you 4 doing this video . I to was plague and frustrated have waren manual hubs and changed the egr pump and were back in business .
.Thank you so much you saved us a lot of money and time...My husband said he would never have figured this one out and the truck would have to be taken in to the shop.....thanks again
You're a Bad Ass! You just fixed my truck. Thank you!!!
This is why I love RUclips. My friend, you are paying it forward with this video. I like you humor as well. Whether you realize is or not - you are hilarious. If we lived close and you liked beer, it would be my treat. I feel your pain with eliminating all the possibilities... and all I need to do is buy a Vacuum EGR Solenoid and install it. I even know what it looks like and where it goes. Too easy. Thank you bro.
Yeah you are the man. Thank you sir. Fixed the problem. Was have the same issue over a year now so ty.
Thanks you so much sir you saved us a ton of time out in the Texas heat and money. However I found that the part for my truck wasn't called EGR, for my 2001 f350 7.3L it was called a vacuum actuator. It does the same thing its just a different name I guess. But anyways I thank you very much!!!
You sir just saved me hours of diagnosing this problem, thank you and God bless
True story, me too.
same bro.
THANK YOU!...FIXED!! thanks soo much for posting this you saved me a lot of money
I needed that timely info, thanks bunches
Thank you for the video! My problem exactly while travelling. Ford dealer had the part on my way, 20 minute job, and was fixed!
Were you having this problem when you were on long road trips? My 2007 when I drive for a few hours at a time the ac will switch out of the vents if I shut the control off for a little bit and turn it back on it will work again.
@@Fordsuperduty6 It was on a long trip, but started when we were driving around town a few days. My AC would not come back on once it went off no matter what we did with the controls.
Thanks! Now I can finally fix my old mans truck.
Thanks for doing this video. I find one at the junkyard because I'm seriously that cheap. I works great!
A hero of the internet. Thank you sir
Oh Man!.... You saved me so many frustrating hours with this easy fix. Can't thank you enough. Fixed my air flow vent problems as well as an issue I was having with my 4WD. Part was $42 bucks at Autozone. Took
Good to hear Paul! I almost removed this video from public view. Like the host of others that were of a more personal nature, I'd just recently made them private. Those and this one had been on my "channel", because I'd never expect my topical channel to gain the popularity it enjoys specific to paramotoring. I'd recently changed the name of my public presence, in attempt to more narrowly target that audience of paramotor enthusiasts, but know that this vid has helped a huge number of people, so I'd left it in the mix. Stick around and learn to paramotor too!
When a video is well done and addresses one’s problem, it’s a relief to find it!
got to say I was sceptical but at this point I was willing to try anything, went out started my truck put the control on max air raised my hood tapped on the vac pump and BAM it actually is working like it's supposed to, Pat yourself on the back probably saved me a bucket full of 💰 on repairs !!!!!!!
just want to say thanks that was my problem .saved me alot of money
Thank you for posting this. It was the problem and saved me money and hours. You da man!
I've been a little thin skinned lately, so thanks for your positive comment. Recently, some guy admonished me, saying that he doesn't randomly replace parts as that is an amateurish way of tackling a repair. Like I told him ALL of the components could be serviced and replaced for less than the cost of half an hour at a local shop full of incompetent "professional" mechanics... I have never had goos luck with having automotive work done in my home town!
Here is the proper description and part numbers for 1999-2010... It's a Hub Locking Solenoid..
Dorman OE Solutions 600-402 4WD Hub Locking Solenoid replaces Ford 7C3Z9H465A F81A9H465BA F81Z9H465BA and is perfect for replacement.... This Vid saved me a whole lot of time and work... THX Yankee
Good tip! I'll keep that in mind when my air goes out.
Thanks! This solved my 2000 F250, got used to it for so long I forgot what it was like to have working front blowers, summer is upon us!
Awesome. I sold (traded in) that truck back in 2017. You should consider taking up paramotoring. Great summer hobby (see my other vids)
Thanks brother! Worked like a charm!
I just fixed this problem on my 2002 F250 with 7.3 and no A/C, it was the vacuum line that runs from the pump to that plastic canister, just popped it back on and it now works perfect.
Fixed my issue. Glad i found this video!
You are amazing!!!!!!
Thank you so much for sharing your experience
You really save me a lot of time and money having my
truck in the shop
I really appreciate
you
Have a wonderful summer.
Thankyou sir! Working on one of our fleet trucks. Now I know where to look
Just order the part from O'Reilly's and going to pick up soon, hopefully it's the fix and you be the man !!!!!
This is great info! I hope it will work on my excursion
Good man, great video. Thank you for sharing the wealth of knowledge. More and more the shops disappoint. Time to DIY. God bless.
cant thank you enough! cost me 30 dollars, took less than 10 minutes to change out
Thanks! Your video helped me trouble shoot and fix this same problem with my F250 4x4 in 30 seconds! Electrical Plug to Vacuum pump was loose.
partner absolutely love and agree with your comment about the taxes. I have the same issue in both categories. Good vid
I am havig the same problem, one of the commenter said an old time mchanic said to hit it wih a hammer and see if it would start to work,so i took that advice and tryed it and it did start to work properly so now all i have to is find a new one thks for the video and posting it here
Thank you! That helped me fix my issue.
Awesome video straight to the point! I have an issue with it going to defrost only when i activate 4X4 which from what i read is a vaccum leak in the hubs or close by.
Yep that fixed mine too!!! To bad I found your video AFTER I changed everything you did! THANKS
I have a 2000 Super Duty with this exact problem. Can't wait to try this - many thanks sir.
Good luck! It's that time of year...
@@YankeeinSC1 My 2000 Super Duty has the 5.4 V8 but no vacuum pump that I can find or hear running. Seems like the vacuum is getting pulled by the intake manifold? I can get the AC blowing out the vents if I jiggle the vacuum lines and power/grounds but it quits working after a few minutes.
my 03 ford f250 had exactly what you described go. thank you for giving me a place to start on fixing. I am hoping fixing this will be my answer :)
Exactly my problem, thanks for getting to the end quick and I hope it fixes mine...
Cool! stick around and subscribe and you can learn how to paramotor too!
Thank you, it 100% fixed my trucks issue.
Fixed my problem. Thanks for the video.
Thanks for posting this video. This fixed my 2001 F250.
I love hearing that! glad I could help.
Thanks for the time saving info!
I changed this vac pulse actuator saw some improvement, but still blows Cool air out defrost vents on a hit day. Why does it work less on a very hot day?Also suspect my 4wd does not shift in & our correctly. What's up?
I've got a 2000 ford ranger that is going back and forth between the defrost vents and panel vents do you think it's the same thing
Appreciate the video and thanks for making it I am going to check out a few of those on my F-250 blessings thank you so much
Thsnk you!@! I have have same issue and been chasing hoses ....this is the only thing I haven't done
your video led me to my fix... a/c not cooling properly and defrost defaulted to on... checked vacuum pump..it was ok.... but noticed the pump was running intermittently so I knew there had to be an issue some where..started inspecting vacuum lines that I could easily see... discovered the line that apparently controls the hot water valve going into heater core under the hood next to oil fill was actually about to break. Used a 5 inch piece of my drip line from my garden irrigation system to fix. air comes out of vents at 52 degrees now so I suspect the broken line was allowing hot water into heater. 2007 ford f250 king ranch.
Awesome! I did not previously know the heater core flow valve was also tied in. I guess a good system schematic might also help, but there are so many that claim to have fixed their system when even dealers couldn't, why spend the money on a manual that may not even offer the fix?
great video it sure helps. the part by the way is called 4wd hub locking solenoid.
Thank you! This video was very helpful.
Hello I have a 1985 Nissan 300zx that also my A/C is stuck in delault mode where my cold air is only coming out of my defroster vents what part would you recommend that i should maybe take a look at replacing ?
Great info, thanks. But I'm still glad I have the Manual hubs on my Super Duty. 👍😎👍
thank you a million times ,,,,mine was just unplugged ,, 30 seconds to fix