After replacing a variety of ac components, I took my truck to an auto mechanic and he couldn't find the reason for the ac clutch not engaging. Been driving it for quite some time with the inside windows fogging over, not fun. So today, saw your video, replaced the short oem vac lines at the junction you pointed out (they were dry rotted) and was able to get ac clutch engagement and full heat with air movement from the defrost vents to the floor vents! Thanks so much for the tip!
Was having the same problem with just air coming out the defrosters . Figured I'd be having to tear the dash apart to find the problem, but then I watched your video and found that when I changed the fuel filter I must have knocked the line off . Thank you for posting this and saving me the aggravation !!
After searching video after video and dreading removing the Blend Door motor (huge job) I found your video and within 20 minutes the problem was solved finding a small 1/8" vacuum line under the hood broken. Patched it with a temporary rubber sleeve. Very thankful for your post!!!
Thank u. I wasn’t think a vacuum line under the hood. U helped me out a lot I appreciate it there’s a storm coming I needed this fixed. Wasted my day changed the thermostat. Didn’t realize the vent controls weren’t working till after
You have a new subscriber!! I had no idea where to start, CZcams rocks when it comes to things like this. This definitely save a $175 diagnostic fee I'm sure would have been charged by almost any shop. Mine had become disconnected and had not been working for some time. Hope it fixes my cruise control too.
The vacume line for the heater controls on this 99 dakota had been cut inside the engine compartment...i used a couple inches of rubber tubing to splice the line back together....the heat controls work now and there's heat now too...thanks brother..👍
The vacuum was exactly my problem. Not only old dry rotted leaking hoses but further along that hard plastic tubing manifold along the firewall it had separated and needed splicing together with some small diameter vacuum hose. Replacing the dry rot and rejoining of the manifold allowed vacuum build-up and regaining control of a/c output vents!
I Love you man! I had the same problem on a 2002 Diesel. I followed the vacuum line around to the front driver's side of the engine where there is a vacuum pump. Old cracked boot was the problem. Thanks!!
Bro my wife just came in and said the ac only blows out of the defroster . So I watched this video and boom it’s fixed , thank you for the heads up , so cal heat is nothing nice in July
With hindsight I should have checked vacuum lines first; however after fixing the same issue on my son's 2004 RAM with the HeaterTreater kit I bought the blend door kit for my 2001. After installing the HeaterTreater blend door connector I realized my mistake. Found this video and then immediately found a cracked vacuum line in the engine compartment about 3" from where the line entered the firewall near the AC lines. I was able to make the repair by sliding new vacuum hose over this small vacuum line.
@@ricardojuarez291: "Also" and "as well" mean the same thing, so use the edit feature to delete one of them for the sake of future readers (which action will take you less work in the number of clicks than writing a new reply to me would, and wouldn't be "morally wrong" to do because you own your mistakes, or whatever).
On the second gen rams the hvac unit has doors that use a vacuum motor to position the door; the vacuum motor responsible for air coming out of the defroster vents all the time is the one mounted on the far left of the unit there are just 2 ways for it to fail, loss of vacuum or mechanically when a small plastic pin breaks off which is what happened in my case. The fix was easy, I drilled a hole in the door arm and put in a bolt and nut, it's fixed forever; at the far right side of the unit is the door for fresh air or recirc air. When the A/C is in max A/C mode the air is being recirced. As for temp control, it will control the blend door either with a mechanical cable or a stepping motor. Hope somebody finds this info helpful
Wow Im having the exact same issue with mine and couldn't figure it out. Did what you said in the video and come to find out that that vacuum line is completely broken off 😂 Gonna replace it and hopefully that's the only problem. Thanks man!
I just want to say, thank you so much for sharing this information!!! You just saved my day!! Been driving a solid black cummins for 2 months with no ac and I couldn’t take it anymore, and because of this content I was able to get everything working like normal again!
Because of your video I found out the vacuum line was missing. Replaced the vacuum line. Ac ducts now work correctly. This also fixed my cruise control. 2001 3500 diesel.
I have a 3.9L 01. Saw a broken vacuum line by the passenger side firewall, is this the one your talking about? And couldnt figure out where it leads to…
That's crazy, I would have never thought of vacuum lines for something electrical, thank you for the post, I will check that out. I had already replaced the temperature control panel new about a year ago so I don't think it's out that soon and I also put in a new fan motor too at that same time so I know it can't be those things
Pretty sure this is my problem. Had a shop replace the brake booster on my 97 12 valve and ever since I got it back it only blows defrost. I’ll check this tomorrow.
My truck is a 2000 dodge ram Laramie slt quad cab long bed 1500 it has ac works good, and the heater works good and strong as well but through the vents in the cluster bezel and the passenger side dash pad vents, but when I put it on defrost it doesn't work heat still comes out of dash bezel vents and the passenger side dash pad vents..
My problem is that my ac blows fine, but when I am accelerating my ac will switch itself to coming out the defrost vents, until I am not accelerating and then it goes back to the top vents. I asked people and no one I know has a clue what to check.....driving me insane!
You have a vacuum leak. Check your vacuum tank for a leak. The vacuum tank builds and saves vacuum for when you have minimal vacuum under acceleration.
My 2005 Dakota defrost and floor vents worked but not the dash board, I beat the shit out of my dash, took apart a few vacuum lines and blew in them. Advanced auto employs morons so I came to you tube. It is now working and blowing out the vents ! My hand hurts so don’t punch your dash
My 98 At a stop, the AC blows cold as it should When I take off- it stops blowing through the front and starts blowing up through the defrost vents Once I let off the gas I can hear a vent flap smack close and the AC air returns to blowing through the front vents H E L P ! ! ! !
as a second gen owner the last thing we want to do is pull the dash apart
Ain't that the truth
Yeah my dash is perfect but took a chip out of my bezel taking it off
I need to replace my heater core and I’m getting more and more nervous
I still have to pull it off the rubber hose cracked right at firewall
I have no dash😢
After replacing a variety of ac components, I took my truck to an auto mechanic and he couldn't find the reason for the ac clutch not engaging. Been driving it for quite some time with the inside windows fogging over, not fun. So today, saw your video, replaced the short oem vac lines at the junction you pointed out (they were dry rotted) and was able to get ac clutch engagement and full heat with air movement from the defrost vents to the floor vents! Thanks so much for the tip!
Awesome, glad it helped
Was having the same problem with just air coming out the defrosters . Figured I'd be having to tear the dash apart to find the problem, but then I watched your video and found that when I changed the fuel filter I must have knocked the line off . Thank you for posting this and saving me the aggravation !!
After searching video after video and dreading removing the Blend Door motor (huge job) I found your video and within 20 minutes the problem was solved finding a small 1/8" vacuum line under the hood broken. Patched it with a temporary rubber sleeve. Very thankful for your post!!!
Glad it helped
Thank u. I wasn’t think a vacuum line under the hood. U helped me out a lot I appreciate it there’s a storm coming I needed this fixed. Wasted my day changed the thermostat. Didn’t realize the vent controls weren’t working till after
glad it helped
You have a new subscriber!! I had no idea where to start, CZcams rocks when it comes to things like this. This definitely save a $175 diagnostic fee I'm sure would have been charged by almost any shop. Mine had become disconnected and had not been working for some time. Hope it fixes my cruise control too.
Glad it helped, such an easy fix that most shops would love to get easy money on.
The vacume line for the heater controls on this 99 dakota had been cut inside the engine compartment...i used a couple inches of rubber tubing to splice the line back together....the heat controls work now and there's heat now too...thanks brother..👍
Awesome! Thanks, glad I picked to watch your video first.
30 second fix, line came apart, didn't realize.
Glad it helped.
Thanks, man...! Fixed my 2001 after checking line.
The vacuum was exactly my problem. Not only old dry rotted leaking hoses but further along that hard plastic tubing manifold along the firewall it had separated and needed splicing together with some small diameter vacuum hose. Replacing the dry rot and rejoining of the manifold allowed vacuum build-up and regaining control of a/c output vents!
Man this helped me so much thank you so much I found a hose that was disconnected and we reconnected it and every function works now
Glad it helped
I Love you man! I had the same problem on a 2002 Diesel. I followed the vacuum line around to the front driver's side of the engine where there is a vacuum pump. Old cracked boot was the problem. Thanks!!
Glad it helped 👍
Jim. Thanks for confirming the finding I just discovered. The line is missing and I was wondering if it was suppose to connect to the vacuum pump.
you saved my day....thanks for sharing this...you rule!
Glad it helped
Thank you! Sum duck tape and boom it Fixed me right up! Heat and a/c now works
Thanks!!!!!! I appreciate you doing this you damn sure saved me a couple hundred bucks sure enough it was a vacuum line
Glad it helped
Thank you for taking to time to help.
Glad it helped
You saved my ass with time and money! Can’t thank you enough for diagnosing my issue, appreciate it brother 😅
Exactly what was wrong with mine! Thanks a bunch!
Glad it helped
My vent selector just stopped working. Thank you for the video! I'll definitely be checking the vacuum line first!
Definitely, this is a very common problem
Definitely, this is a very common problem
Thanks man! I must've knocked one of my lines loose when I changed my fuel filter
This vid help alot thnx bro 🙌🏼💯
Thank you man! I would have just took my whole dash apart and the problem was just a disconnected vacuum line.
Bro my wife just came in and said the ac only blows out of the defroster . So I watched this video and boom it’s fixed , thank you for the heads up , so cal heat is nothing nice in July
Thanks! Fixed now thanks to you!
Glad it helped
With hindsight I should have checked vacuum lines first; however after fixing the same issue on my son's 2004 RAM with the HeaterTreater kit I bought the blend door kit for my 2001. After installing the HeaterTreater blend door connector I realized my mistake. Found this video and then immediately found a cracked vacuum line in the engine compartment about 3" from where the line entered the firewall near the AC lines. I was able to make the repair by sliding new vacuum hose over this small vacuum line.
I’ve never been more pissed but happy at the same time I didn’t even fix them yet I touched them and it fixed my problem now I gotta change them out
This worked for me! thanks!
Excellent! Worked for me. Thanks!
I have the same issues, but also controls cruise control as well . This video was well explained thanks
Glad it helped
"Also... as well"? Oops.
@@HelloKittyFanMan. Hahaha and I haven't figured out too busy
@@ricardojuarez291: "Also" and "as well" mean the same thing, so use the edit feature to delete one of them for the sake of future readers (which action will take you less work in the number of clicks than writing a new reply to me would, and wouldn't be "morally wrong" to do because you own your mistakes, or whatever).
You ever figure out the Cruise control I’m having that and this problem right now
On the second gen rams the hvac unit has doors that use a vacuum motor to position the door; the vacuum motor responsible for air coming out of the defroster vents all the time is the one mounted on the far left of the unit there are just 2 ways for it to fail, loss of vacuum or mechanically when a small plastic pin breaks off which is what happened in my case. The fix was easy, I drilled a hole in the door arm and put in a bolt and nut, it's fixed forever; at the far right side of the unit is the door for fresh air or recirc air. When the A/C is in max A/C mode the air is being recirced. As for temp control, it will control the blend door either with a mechanical cable or a stepping motor. Hope somebody finds this info helpful
Great info
Wow Im having the exact same issue with mine and couldn't figure it out. Did what you said in the video and come to find out that that vacuum line is completely broken off 😂 Gonna replace it and hopefully that's the only problem. Thanks man!
Glad it helped
The vacuum line was the problem thanks I was able to get the ac going on my ram..!!!
Glad it helped
I found a vacuum leak and it's the hose leading inside to the cabin do I have to take apart the whole upper dash to fix it?
I just want to say, thank you so much for sharing this information!!! You just saved my day!! Been driving a solid black cummins for 2 months with no ac and I couldn’t take it anymore, and because of this content I was able to get everything working like normal again!
Great tip thanks
Because of your video I found out the vacuum line was missing. Replaced the vacuum line. Ac ducts now work correctly. This also fixed my cruise control. 2001 3500 diesel.
Glad it helped
Thx for help, easy fix it
I have a 3.9L 01. Saw a broken vacuum line by the passenger side firewall, is this the one your talking about? And couldnt figure out where it leads to…
Big help thanks.
Glad it helped
Thanks for the tip
That's crazy, I would have never thought of vacuum lines for something electrical, thank you for the post, I will check that out. I had already replaced the temperature control panel new about a year ago so I don't think it's out that soon and I also put in a new fan motor too at that same time so I know it can't be those things
Glad it helped
Nice job
Thanks for this video thank you thank you thank you
What size house you using? This video is very helpful
Pretty sure this is my problem. Had a shop replace the brake booster on my 97 12 valve and ever since I got it back it only blows defrost. I’ll check this tomorrow.
That’s right around the area of this vacuum line so there is a good chance
Where does the end of the other side of that hose go to? Mine is missing
Thank you for some simple trouble shooting
Thank you
My truck is a 2000 dodge ram Laramie slt quad cab long bed 1500 it has ac works good, and the heater works good and strong as well but through the vents in the cluster bezel and the passenger side dash pad vents, but when I put it on defrost it doesn't work heat still comes out of dash bezel vents and the passenger side dash pad vents..
Can somebody help me please???? The line that’s running inside the cab what does it run to???
Thanks
no shit. My line was disconnected under the hood wow thank you
My problem is that my ac blows fine, but when I am accelerating my ac will switch itself to coming out the defrost vents, until I am not accelerating and then it goes back to the top vents. I asked people and no one I know has a clue what to check.....driving me insane!
You have a vacuum leak. Check your vacuum tank for a leak. The vacuum tank builds and saves vacuum for when you have minimal vacuum under acceleration.
thank you. You are jesus
Same on v8?
My 2005 Dakota defrost and floor vents worked but not the dash board, I beat the shit out of my dash, took apart a few vacuum lines and blew in them. Advanced auto employs morons so I came to you tube. It is now working and blowing out the vents ! My hand hurts so don’t punch your dash
Mine broke off right at the firewall. I either have to take the dash apart or drill a big hole in the firewall
I have a similar truck to yours but 1500 and the 5.2 litre 318 magnum v8
Where did you find that part?
Autozone
@@Alpha-Works-Tx whats its called
My 98
At a stop, the AC blows cold as it should
When I take off- it stops blowing through the front and starts blowing up through the defrost vents
Once I let off the gas I can hear a vent flap smack close and the AC air returns to blowing through the front vents
H E L P ! ! ! !
Dude if I could I'd kiss you, I fixed it in 60 seconds, it became unplugged
Glad it helped
Where is it plugged in? Mine got unplugged but idk where it is connected
My Blower Speed will only blow on high will im driving it will blow on three
Help me
What can't hear ya
My problem is it only blows out the floor
Yea that's not on my 2002 dodge ram. All electric