Dodge Van Heat Not Working - Fresh Air Intake Diaphragm Stuck Open - FREE REPAIR

Get B2500 parts here: amzn.to/2cwM3Ji
Heat stopped working in your Dodge B series B1500, B2500, or B3500 van? If the thermostat is good, coolant system is bled, and heater core is not clogged, the vacuum diaphragm that controls the fresh air flap is probably stuck open. When the fresh air flap sticks open, cold air will cool the heater core and you'll only get luke warm heat from your Dodge Van in the winter. All you need to do is to disconnect the vacuum line from the diaphragm that controls the fresh air flap, then push the flap closed with a long screwdriver. Then just enjoy the heat in your Dodge B1500, B2500, or B3500 van.
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[@philb4786]

Finally someone who know what they are talking about. Thank you.

[@coachgeofft]

I added about 20 views getting it right. Thank you so much!!! I live in my van and now I wont freeze!!! You saved my life. Thank you!!

[@recycledteenager7483]

If you only knew how many videos and how many people I asked about this and yours is the only one that actually showed me something that I need to know thank you thank you thank you I'm going to give this a try because in my van I don't need the dash only blows out about 80 degrees and that's it mean while everything else is getting hot but I get no no more heat out of the floor or the dash or the vents it just blows only blows out good it's not clogged and the fan is working great except for the 3-speed all I have is high-speed but it blows out real real good but it blows out cold so I'm going to give that a shot and see what happens then again I want to say thank you thank you thank you

[@recycledteenager7483]

When I worked at Greyhound I had a problem with the with the bus that came in overheating and the bus was given to me to do work on and what I found was a rag stuffed in the in the transmission engine cooler and I pull drag out and then bus wouldn't overheat again I wonder if that's a possibility here too?

[@recycledteenager7483]

Yes it does shift good from the short little Drive I had which was about 2 miles or so because I don't have it licensed I didn't take it on the highway but I did take it on some side streets and they do work

[@aDIYCarGuy]

cool

[@recycledteenager7483]

a DIY Car Guy I'd have to say good morning and do you remember me when I was asking you about my van and I told you I couldn't really test drive well I got the van legal and I put on 750 three and a half miles and the transmission performed flawlessly and heater still work but I got to I got some issues with the heater I don't know if it's the modulator or vacuum lines but it would not stay in one mode such as it would change automatically from vent to defrost two bottom heater and I do not know if it's the control valve or the vacuum lines any ideas?

[@aDIYCarGuy]

I do remember. Good to hear it's on the road and working good! If it's going automatically I would think it's something electrical in the climate control unit. Or a flap might be flopping around if it broke loose from it's actuator.

[@juanbarturen2726]

I have that same problem. Froze my butt driving from Georgia 2hrs North.. in the future. I'm replacing the vacuum with mechanical cables. Or not. Looks like a tight fit

[@cherylchoudhary1552]

Hi. i stumbled on this trying to get a different hvac repair done, and I noticed the vacuum hose you pulled to do this is already disconnected in my dodge van. Where does it reconnect, because I am sure that adds to my existing hvac problem. Thanks!

[@mrblueroadscellphone1991]

I cannot see the switch you're talkin about the defroster vents at the dash are putting out hot heat but the big thing in the floorboard at the passenger seat is doing nothing would that be the situation here

[@turboman4736]

You're actually backwards on both of them if you pull vacuum on them that opens them the same way with the valve on the bottom of the airbox that you were saying push to the back of the firewall you have to pull it to you

[@CarolinaGuy]

This is true. My 95 B2500 conversion van had this problem after the cable for the hot and cool snapped. I had no heat,watched this video and went to see if I could use this fix. I had to pull the the linkage forward after disconnecting vacuum line and then checked the heater core valve which is open when not depressed. I now have heat again. The only question I have is should I hook the vacuum line back up or leave it disconnected? I'll do some trial and error tomorrow.

[@turboman4736]

@@CarolinaGuy you either want to hook the vacuum line back up or plug it off because that will cause a vacuum leak in your system and make your motor idle rough or not run right at all if you have a vacuum leak

[@codymarple1785]

I have a 94 B250 Jayco conversion van. I can't pull or push the lever after removing the vacuum line the heater box is in the way

[@recycledteenager7483]

Yes and I've seen the radiator covers on the on the big trucks as well I have a very good friend of mine who's a trucker and he and a lot of other truckers use these radiator covers they buy and mount on top they're on the front of their trucks especially if they're driving up in the north so I want to thank you again for all your your input and it's a big help because I used to work diesel not gasoline and I never worked on a van so and I've been kind of retired for about a little over 10 years so I've been out of the loop for a while and I have a tendency to forget some things but thank you thank you thank you and hopefully I will talk to you later

[@aDIYCarGuy]

you're quite welcome, let me know if anything works to fix it

[@recycledteenager7483]

And by the way the van that I have does not have that vacuum shut off valve that is clearly seen on the van in your video it is been taken out the hose that been replaced without reinstalling that and there's a white vacuum line which I believe went to it so I sealed that off too so doesn't suck up anymore then it has to

[@dirtfarmer7]

Just got one of these, please make a blend-door repair video. My A/C switches to defrost when I hit a bump :(

[@elhoracewayhoslotcarswvias3170]

The blend door is right above the vent on the firewall and if you look at the duct up there that is the blend door and that closes between your heating heater core and your cooling for the blend door works off of your temperature dial blue red the more you turn it that blends in the cooling coil to the thing that isn't your defrost that's your door that's your defrost in your he. Your dad's or heat on the floor that works off of your knob so it really has nothing to do with your blind or you probably just need a new Switch or there's a loose wire or something or something under there

[@AlexM-vl6ls]

My air conditioner switch to defrost when accelerating which valve do i need to replace or what can i do to keep the air conditioner to the front vents, thanks

[@garionporter5961]

ever fix this? pretty sure its a check valve

[@recycledteenager7483]

Here's another thought I have would two heater cores running all the time would that stop the thermostat from opening up? By the way the new thermostat is 180 the one I took out was 195

[@aDIYCarGuy]

yea it could be that the coolant is never getting hot enough in the first place. but it would have to be a really cold climate. where are you located? what is the air temperature there? have you tried turning the rear heat off, or all the heat off, letting the engine warm up, and then turning just the front heat on?

[@recycledteenager7483]

Another thing is that when I had the cap off and I'm watching for it I'm looking down inside the radiator radiator looks clean now the other thing is that when the thermostat opens up you can watch the water or the coolant circulate through the radiator I did not see where the thermostat opened up and I did not see any circulation in the radiator but I did see the steam coming out of the cap

[@aDIYCarGuy]

Whoever replaced the water pump might have been trying to fix the problem that you're having. Could be it needs more bleeding. Or the radiator could be clogged, heater core could be clogged. I'd take the bottom hose off the radiator, pour water through the top, and and see if water will drain through. I would take both hoses off the heater core and try to spray water through it with a hose and see if there's any flow. If either are clogged I would replace or unclog it and flush the system with a flush chemical/kit if the climate will be warm enough for a while, if not, just flush with water as much as possible and refill with antifreeze..

[@recycledteenager7483]

a DIY Car Guy I flushed out the system the best I could got a flush kit with no chemical for the flesh but I tapped into the heater core hose that leads the in the incoming and I turn the water hose on and I had the radiator cap off and I had your top radiator hose off and I flushed it until it came out clean I have the bottom radiator hose off when I drained it so the radiator is is clean there's no it comes out just very well tomorrow I'm going to disconnect the heater core lines and back flush the heater core and see what that does

[@aDIYCarGuy]

before you do all that, warm up the engine so the temp guage is where it's supposed to be, put the heater on, rev the engine, and feel if the air gets warm coming out of the vents. (if you havn't done this already). lmk what happens. the rad and HC could flow, but they might be restricted

[@recycledteenager7483]

I did put a couple miles on transmission to check you know to get it circulated through through the system and it seemed to shift and drive extremely well I didn't take it on the highway but I did take it on one of the side streets and I got up to about 30 miles an hour it didn't seem to have any problems but that's not to say there couldn't be

[@aDIYCarGuy]

hopefully it works out and doesn't need a rebuild

[@turboman4736]

First off before I done that I check and make sure the valve is opening for the heat to go into the heater core right on the top of the motor that round cylinder that looks like a fuel filter with the vacuum line going to it that open and closes your heater core for your hot water to go in make sure that's operating correctly before I start tearing into my vehicle easy check just grab and make sure the heater core hoses are hot going in and out if not your power was stuck closed and your vacuum is not opening it up

[@LIFEISGOOD197]

Please would some one advice me on How to fix or replace in my van, the hot air got stuck to windshield only and won't change to floor feet when pressing control buttons on dash.

[@garionporter5961]

ever get this fixed? I think either bad acuator -or stripped plastic connector from actuator to blend door (also possible leaves/something jammed in there -but unlikely) I had a rat running around in mine for a few days WHILE DRIVING IT!! LOL so he may have nested or something really gotta take mine apart

[@recycledteenager7483]

I'm in Northern Colorado and currently it's supposed to get down to 33 to 34 degrees tonight and the rest of the days for the next 10 days is going to be 40s 50s and low 40s in the nighttime. And where are you located at

[@aDIYCarGuy]

I'm in PA and the temps are about the same here right now. I think your heat should work fine in those temps. I think there's something wrong with a component of your heating system, you never know though, but I only see diesel school busses blocking the radiators around here when it's in the 20's and below.

[@johnmonroe1998]

How about removal of the heater core for than van

[@caliwooddetail]

Mine was the blend door actuator it was stuck. Pull it onwards and immediately felt warm air. Still have to replace it I’m good for now!

[@recycledteenager7483]

Okay an update on what you told me to do and your video is disconnect that vacuum line manually push the lever back towards the rear of the van which I did and I still have no heat and when I reconnected the vacuum line it the booster obviously did work because it removed that lever towards the front of the van so I disconnected lever manually pushed it back again and I still have no heat it blows out real good real strong through the vents the dash and down below but with no heat what can I try do

[@aDIYCarGuy]

Feel the upper and lower radiator hoses and see if they're both hot when the engine is warmed up. Also feel both heater core inlet and outlet hoses to see if they're the same temperature, if you can reach them, I don't know where they are located but they should be going through the firewall somewhere.

[@recycledteenager7483]

And also I'd like to thank you for a very quick response I wasn't expecting it this quickly

[@aDIYCarGuy]

you're welcome, i'm just sitting here relaxing, not much else to do lol

[@recycledteenager7483]

So what I'm thinking is that I've got a bad thermostat and a clogged heater core could you maybe kind of confirm that or my just shooting in the dark

[@aDIYCarGuy]

it's probably one or both of those

[@aDIYCarGuy]

more likely the thermostat if only 1 radiator hose gets hot

[@recycledteenager7483]

Well I want to say thank you so much for all your inspiration and help and getting my van to heat up it heats up oh man it heats up front back everything works pretty good so off to my next project of changing out the transmission filter and Gasket because it leaks and hopefully talk to you soon thank you again

[@aDIYCarGuy]

That is great to hear! What ultimately fixed it, was the heater core clogged or something else?

[@recycledteenager7483]

And I want to say thanks again I appreciate it all your help and support there

[@aDIYCarGuy]

no problem hopefully something will work to fix it

[@recycledteenager7483]

I got the heat control working to it works great what it was they leaking vacuum line

[@aDIYCarGuy]

Nice!

[@danjossund8741]

Excellent five second fix thank you so much

[@enyerom1892]

Its funny, my diaphragm is backwards on my 98 so i had to pull it to the front. Drove for 2 weeks with an ice box before i realized the difference in set up between our vans. Likely i watched the video again

[@anthonymcclarren4647]

I have this work but my turn signals quit working all fuses are good

[@recycledteenager7483]

Yes I did both of them are hot there's at the inlet and Outlet have a y splitter that goes from the to the rear the of the van it's got a rear heater air conditioner in the van in the back of the van as well as upfront and both of those lines are hot very hot to the touch now in the rear it does it's got for vents that blow up on the roof cuz this is like a customized van it blows out slow but it does warm up but it's a lot warmer than the front like I said I don't get any heat out of the front

[@aDIYCarGuy]

maybe the front heater core liquid flow is restricted in some way and so most of the coolant is going through the back. if you can access the front heater core and feel it or take the temp I would do that

[@tonymaples5281]

Can someone show me the the vacuum lines I all most have it. Need pics please!!!

[@recycledteenager7483]

Good news and some indifference the good news is this morning I took the the heater hose from the the splice and I flushed out the heater core and it was a little dirty in there but I flushed it out clean I start the engine I reconnected the bottom radiator hose and I start the engine of a filled up the the radiator and engine block and before I connected the heater core back the water pump is definitely pumping a lot of water up into the heater core so that part is good like I said the heater works now I'm getting real good hot water out hot air coming out the vents and even in the back now the thing is is I drove it a little bit I run it for a while and I drove a little bit to get thermostat to open up I didn't see any indication that the thermostat opened and even after driving it checked the bottom radiator hose and it's still cold main while everything else is hot any ideas?

[@kennethschafer6504]

I want to know more about the 951 next to it...

[@aDIYCarGuy]

Driving it: kzbin.info/www/bejne/eWmpdJuZg8uHZ8k My 944/951 repair playlist: kzbin.info/aero/PLAu9Stvuzy_ZgIU3F2px-4tt5nltiRzpj It is a 1988

[@recycledteenager7483]

Well thank you again and let's see a list of things I got done on it oil change thermostat change coolant change new serpentine belt and transmission practically changed and let's see other than light bulbs I think I'm ready for a road test as soon as I get it I get the license plates on it so when that happens whenever it happens I'll let you know

[@aDIYCarGuy]

you're quite welcome! thanks!

[@recycledteenager7483]

I believe it got up to operating temperature the top radiator hose I can still hold on to all though it's very it's extremely warm or hot the bottom radiator hose towards the radiator itself just as it takes that bend to go into the radiator it's still ice cold the heater course the forward split to the heater core is hot the return is hot the one in the rear is cold

[@aDIYCarGuy]

if one hose is still cold, then the thermostat isn't opening, gotta change the thermostat, or at least take it out and put it in a pot of hot water to test it and see if it opens, the water has to be at least the temp that the thermostat is rated to open at

[@recycledteenager7483]

What I did was when I took it took the heater hoses off where the the why is and I back flushed it and enough forward flushed it and and after filling the radiator and making sure you know started the engine and I disconnected the return line to get all the air bubble and may have an airlock in it and once I did that you know the fluid start coming out and then I reconnected it tightened hose up and that seemed to work

[@aDIYCarGuy]

Awesome thanks for letting me know, that was a good idea to take the hose off until the fluid started coming out of the heater core

[@recycledteenager7483]

I wanted to give you an update on my van when I did the transmission I went and had and bought 2 gallons of transmission oil for the vehicle not knowing how much it would take but I figured having a little extra is better than not having enough so I go to take the pan off and all the boats I know the pan was leaking I know the gasket was leaking because you could see it but when I go to take the bolts off every one of them came out by hand with my fingers oh my God I was thinking this is not good so I let the pan down to the drain you know how you hang a little bit to get most of all out no oil came out until I took the completely off well checking all this stuff out it looks a little dirty looks a lot dirty and when I went to refill I use one gallon cuz I figure that's how much the pan would hold well after running it through the gears and such warm it up it took 2 gallons to bring it just a little bit above the full mark ouch I think I'm in for a transmission rebuild like clutches and such so question is do you know how to rebuild a transmission because I'm not real good with Transmissions I'm familiar with them but not real good with them so if worse comes to worst😕

[@aDIYCarGuy]

Yea those bolts aren't in tight to begin with so they might have loostened on their own. If it shifts good I would just drive it. Make sure it's not leaking from front or rear main seal, and also transmission cooler lines if it has it. If it's not working good then there's probably not much you can do without rebuilding it, CRC makes a transmission-fix fluid called trans-x for trucks, might try that, but can't guarantee anything. I've never rebuilt one so I don't have much knowledge off-hand on them.

[@nogamer9780]

Thanks

[@recycledteenager7483]

Well I want to thank you a whole heap of a lot that was a pain in the ass to change out that thermostat and by the way the old thermostat I just put it on the stove in a pot of water took the water after boiling and that sucker did not open but the new thermostat we still got a problem installed new thermostat installed the system would be the water came out clear blue eyed time I stop Flushing I started it up and left the cap off but the cat back on let the cat off that type thing until it heated up took a thermometer and I got 180 degrees at the radiator cap with it off and the bottom is still cold now the water pump looks like it was been recently replaced not to say that it's not no good but it looks like it was recently replaced any ideas oh by the way I get heat in the rear of the van but still fairly warm up front

[@recycledteenager7483]

Okay thank you thank you I have no leaks not in the front not at the rear and definitely not at the pan I kind of pride myself and when I fix something and make sure it doesn't leak. Insert a happy :-)

[@aDIYCarGuy]

that's good haha, is it shifting good?

[@jimbobooth5822]

Man that van looks like a easier to work on than a Ford Econoline of that era.

[@aDIYCarGuy]

there's some stuff that's pretty hard, like the upper radiator hose, but a lot of the stuff is pretty accessible

[@jimbobooth5822]

a DIY Car Guy nice! What engine does it have?

[@aDIYCarGuy]

318 magnum. i sold the van last week lol

[@jimbobooth5822]

a DIY Car Guy I'm happy to hear that . I bet it passes everything except a gas station lol

[@rodneyarredondo7843]

thank you ,life saver partner

[@aDIYCarGuy]

you're welcome, i'm glad it worked!

[@elhoracewayhoslotcarswvias3170]

I have a Dodge 2000 1500 Ram van the door clearly is open to the outside when the rod is pushed to the back of the van it has to get sucked Ford for the vent to open to the inside you can look under the dash and clearly see it you don't know what you're talkin about

[@thetribeofbenjamin9332]

Can you elaborate on this

[@elhoracewayhoslotcarswvias3170]

@@thetribeofbenjamin9332 if you look on the passenger side underneath the dash the metal Grill that's made in the firewall you will see a door and it is normally closed if you go out under the hood and go to the left side of the air conditioner and pull that Rod back towards the front of the van and wire it shut and go look inside now you can see the hole where the fan is the squirrel cage fan thus you are sucking air from the inside of the van and not the outside when the arm is pushed towards the back of the van that door is shut and it is getting air from the outside

[@mrkzj2]

Keep up with the videos, you have good tips and are helpful. Just sick of the lens you use.

[@aDIYCarGuy]

Thanks for the feedback. I use this camera because it has a good HD image, and the wide lens captures everything in the shot. I agree it is a bit too wide, in the future I want to get something that's not quite as wide. My other camera's image is just too tight and it doesn't do upclose shots very well.

[@recycledteenager7483]

PS that thermostat is a pain in the ass LOL

[@aDIYCarGuy]

haha yessir it is

[@sonja_ebonheart]

I have a 94 dodge starquest and I have just noticed the air conditioning system in the back gets hot but the air doesn't work. Does this run the ac in the front vents too? If not I'd like to remove it. I'd love it if my front ac worked but It makes no noise when I switch it on