2nd Gen Dodge Ram Heater Box Diagnostics and Common Problems

Автокөліктер мен көлік құралдары

In this video I break down the functions of the heater box in the 1994 to 2001 Dodge Ram pickups, as well as going over common problems that can happen and how to diagnose and fix them!
Subscribe to my channel for more and follow me on Instagram @HHK_Performance
Check out my website at www.hhkperformance.com for some cool stuff!

Пікірлер: 80

  • @michaelbuettner6560
    @michaelbuettner65602 жыл бұрын

    One of the best videos of both the heater core which needs replaced and the evaporator, hadn't seen much that was clear... a big thanks!

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    2 жыл бұрын

    Thanks! Glad the video was helpful!!

  • @notdavid8175
    @notdavid8175 Жыл бұрын

    this is one of, if not the best video on both the heat core and Evap on the ol YT. Good job Sir.

  • @fonzysgarage1534
    @fonzysgarage1534 Жыл бұрын

    Great looking 2nd gens! Both are perfect in their own way!

  • @bigindian1987
    @bigindian19878 ай бұрын

    Wow a video with all the information I was looking for

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    Glad it was helpful! Thats the goal haha!

  • @bildough2775
    @bildough27752 жыл бұрын

    The maroon truck and black truck are lookin great!

  • @bobmartinez3038
    @bobmartinez3038 Жыл бұрын

    thank you for this video,it was very informative...

  • @jackclark1521
    @jackclark15212 жыл бұрын

    Man that helped me so much you have no idea!! Thanks buddy 😂

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    Glad to hear it helped you out!

  • @philhargrave5529
    @philhargrave5529 Жыл бұрын

    Sweet looking trucks mate. I have a 96 CTD with a NV4500 that I use for work. Im in Australia so it was converted to right hand drive back when it was brand-new. She's a very rare beast over here.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    I’ve seen a couple pictures of those weird RHD second gens, very well done and weird to see!

  • @Beast_is_a_dumbass220
    @Beast_is_a_dumbass22011 ай бұрын

    Great video! You were driving me nuts calling it the A/C condenser; it’s the evaporator 🤪

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    11 ай бұрын

    I always get them mixed up hahaha!

  • @woodrownelson2711
    @woodrownelson27112 жыл бұрын

    They hand make them in California called brass Works

  • @GRasimos
    @GRasimos7 ай бұрын

    Thanks for breaking this one down bro.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    6 ай бұрын

    Glad it was helpful for ya!

  • @scottammon8395
    @scottammon83956 ай бұрын

    Thanks for a very good video.

  • @juliedalton482
    @juliedalton482 Жыл бұрын

    Fantastic - Many Thanks!!

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    Glad it was helpful!!

  • @johnyhefner
    @johnyhefner5 ай бұрын

    Thanks! Amazing video.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    5 ай бұрын

    Glad you liked it! Thanks for the comment! :)

  • @chuckluck3303
    @chuckluck3303 Жыл бұрын

    Great video thank you.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    Glad you liked it!

  • @MrSlipknot1969
    @MrSlipknot19698 ай бұрын

    Thanks for sharing!

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    Happy to see so many people finding the video helpful!=

  • @bsrob1
    @bsrob1Ай бұрын

    Thank you! This is so helpful! My a/c blows on floor and vents. I think my floor door is messed up

  • @fasterthanaturtle
    @fasterthanaturtle2 жыл бұрын

    Great great video thank you. How many hours was the whole job? Was that your first time? I got to get in mine and I'm a little scared

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    2 жыл бұрын

    I’ve done it all a couple times, I’d say 2-3 hours for myself all in, but for a first time you may be looking at 4-5 hours tops

  • @GeneNagel1968
    @GeneNagel196811 ай бұрын

    Thank you for this video it's going to help alot when I get ready to do my heater core. My problem right now is I replaced my fan and now I have no air movement out any vent at all. I've pulled the fan.. it's working but no air comes out anywhere. Any ideas😳

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    11 ай бұрын

    How strange… is it possible the fan pulley is “slipping” on the fan motor shaft? So free spinning in your hand it’s fine but when it’s under load/moving air it spins?? Not even on defrost at the top vents it does anything?

  • @TedOption
    @TedOption2 күн бұрын

    Good video. Thanks.

  • @tannerkawi
    @tannerkawi2 ай бұрын

    Great video! I have been trying to troubleshoot a problem where my 01 on max ac or just top vent always will blow air to the feet vents also. I’m sure it’s a problem with the door like you showed but is there any way to fix that without removing the hvac box?

  • @alexanderanduze4680
    @alexanderanduze4680 Жыл бұрын

    Where can I buy new linkages for the heads and hands door running to the vacuum diaphragm? I haven’t been able to find it anywhere online and I could probably use a new door as well. I also need a new foot diaphragm. Rebuilding the entire box. Last place is the junkyard. Any links would be appreciated.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    I havent heard of anything like that, honestly if its not on rockauto then I dont know of anywhere else except for a junkyard

  • @honey8784
    @honey8784 Жыл бұрын

    Good video

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    Thanks for watching! Glad you enjoyed it

  • @JerryMiah
    @JerryMiah Жыл бұрын

    May be a long shot here, but is this similar on a 99 dodge ram 1500 VAN? I cant find ANYTHING ANYWHERE on the ram van hvac stuff. I've figured out most of the stuff I need to just from trial and error. Kind of rednecking it to make it work so we don't have to spend over 1k on someone to tear the whole dash out and fix little things, but one last thing I'd like to find is the recirc door. when i switch from a/c to max a/c there is no different in the sound the blower makes, so Im assuming the door is stuck or the actuator is non functioning. Any help or maybe a video on one would be awesome! Thanks! Great videos btw anyhow. You did a great job explaining the functions on a truck HVAC.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    Oh man I’ve never messed with the old dodge vans, I imagine they’re probably totally a different design but also very similar in how it functions…. You could remove the blower motor and then select AC max and see if you can feel the recirc door close as it should be somewhere near the cavity of the blower fan? Then if it doesn’t work that just means a vacuum leak or bad vacuum pod

  • @JerryMiah

    @JerryMiah

    Жыл бұрын

    @@Hazardous-Hotrod-Knowledge ok thanks!

  • @derekcoiner5946
    @derekcoiner594627 күн бұрын

    South Main Auto has a great video on doing a heater core flush with CLR. it works great. my 94 ram 2500 gasser had tons of flow through the core but the air came out colddd, flushed it in both directions for about 30-40min, hot heat now and has stayed that way.

  • @98dodge360v8
    @98dodge360v8 Жыл бұрын

    Is there a way to get to the recirc door actuator without pulling the box? I want to limit the travel on mine. I have a new core, blend door works good. Even installed a heater coolant assist pump for like a RV. Still cold. It gets warm after 40mins but at -20 all it can muster is barely luke warm. Cant keep the windows clear beliw 0F. Thermostat is good.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    I was able to zip tie the recirc door shut by just removing the glove box and it was right there. You could possible ziptie it half shut?

  • @Man.who.sold.theworld
    @Man.who.sold.theworld Жыл бұрын

    I have 1999 dodge 2500 for about 3 months Ac Worked then stopped, winter came around so I just swept that under the rug and when I went to use heater I noticed my heater core lines under the hood on the fire wall were chopped any advice would be helpful

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    oh man, like someone just cut the heater core lines and theres nothing going to them? Sounds like you'll have to get a new heater core and reconnect them. unless the hoses are still there, then it should be as easy and just hooking them up!

  • @Beast_is_a_dumbass220
    @Beast_is_a_dumbass22011 ай бұрын

    Know anything about flipping the rear axle on these? I have an 04 Dakota and want to lower it as easy as possible; can I just move the springs?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    11 ай бұрын

    Supposedly the dakotas have the same rear leaf spring spacing as a second gen so you can use 2G rear axles lol Frankensteining fun fact! As far as a axle flip, I imagine it just involves welding on a different axle perch and getting new u bolts made? Then maybe doing a c notch? I have a local buddy with a slammed 93-96 sorta area Dakota

  • @JC-vy1bo
    @JC-vy1bo9 ай бұрын

    Great video. I have an odd problem that i can't find a fix for. I have an 09 Ram. The ac works well, but when I turn it to hot it blows heat very well (good temperature), but it only blows at about 30 to 40 percent of the force that the ac does. Recirculation doesnt make a difference. I can't wrap my head around what this could be.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    9 ай бұрын

    Maybe it has something to do with the way the vents/flaps are routed? Like heat + AC it has to now pass through 2 radiators instead of just 1 for the heat? But that’s how a 2nd Gen is done and they blow good

  • @MattSkruff
    @MattSkruff10 ай бұрын

    i replaced my heater core. HEAT! first time ever! shut truck off. never had heat again since that day. any thoughts?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    10 ай бұрын

    How strange… low on coolant? Got air in it? Does it have the electric blend door?

  • @chasesshop2991
    @chasesshop2991 Жыл бұрын

    So there’s no valves on the coolant side, if I’m not getting flow through the box it’s plugged?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    Nope, no valves, no flow means it’s plugged good!

  • @thesheamiester3849
    @thesheamiester3849 Жыл бұрын

    My 99 has the electric blend door, I got a heater treater.

  • @Man.who.sold.theworld
    @Man.who.sold.theworld Жыл бұрын

    If my truck was bypassed am I able to just re connect it?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    Yup! I think you can even hook it up backwards so it flushes itself out

  • @witcher71
    @witcher71 Жыл бұрын

    Steel or fiberglass cowl induction hood on the dually?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    It’s a steel hood!

  • @MattSkruff

    @MattSkruff

    10 ай бұрын

    where did you buy it? @@Hazardous-Hotrod-Knowledge

  • @bgy1591
    @bgy1591 Жыл бұрын

    Do you know why when I hit my brakes I hear a pop and the ac turns off and hot air blows out?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    If you have a older truck (1996 and older I think?) or a gasser then you’ll have vacuum assist brakes, what I would think is happening is when the brakes are pressed you have the vacuum drop and that causes the heater box to turn off recirculate (which is vacuum operated)

  • @jamesvelasquez4236
    @jamesvelasquez42369 ай бұрын

    What my brother is goin thru, i would like to flush the core but i think its that blend door actuator, he barely get heat when he flips it to heat, like luke warm usually entails blend door, got heat to bith side of the heater hose so i know it aint plugged

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    9 ай бұрын

    Pull off that actuator piece and see if the interpolator(?) coupler thingy is broken

  • @mulletsquirrel
    @mulletsquirrel Жыл бұрын

    My AC doesn't work on my 99 and the heat barely works. I'm not super excited to get in there and mess with it, but with winters getting below zero I'm sure it's not going to be fun freezing. I don't think my shattered dash will like coming out...

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    This is a late reply but did you ever yank it apart and get it fixed? Hopefully your dash stayed together!

  • @mulletsquirrel

    @mulletsquirrel

    8 ай бұрын

    @@Hazardous-Hotrod-Knowledge nope I just left it

  • @Ibelieve218
    @Ibelieve2188 ай бұрын

    there's only 1 vacuum line to the box right?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    8 ай бұрын

    yup, it comes through the firewall, a single plastic line that is routed alongside the grommet for the AC lines.

  • @gardenman3
    @gardenman3 Жыл бұрын

    could we have a video an how to take the heater box out.

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    Жыл бұрын

    I could make one yeah, I figure there’s enough other people who make the videos on how to do it but I could give it a try next time I have to do one!

  • @FreeHumorLight
    @FreeHumorLight10 ай бұрын

    how many hours did tht take you

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    10 ай бұрын

    Probably 4 hours R&R but I’ve done it a whole bunch, maybe 5-6 for a first timer

  • @michaelwhetzel6664
    @michaelwhetzel66649 ай бұрын

    What if I don’t get a lot of air out of defroster

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    9 ай бұрын

    Pull your fan and see if your AC evaporator is clogged with leaves n such, that would prevent good airflow through it

  • @santiagopatino3954
    @santiagopatino3954 Жыл бұрын

    thank you for the informative video. Had my jew slave help with faulty actuators.

  • @mr.anonymous41
    @mr.anonymous4110 ай бұрын

    Great video. I own a 2001 Ram 1500 Offroad, best vehicle I've ever had. My heat and ac work but sometimes when I go uphills air flow stops like an internal door closed. Any ideas what may cause this?

  • @Hazardous-Hotrod-Knowledge

    @Hazardous-Hotrod-Knowledge

    10 ай бұрын

    Low on coolant? Maybe at a incline it gets air locked somehow, I haven’t looked at the magnum engines too much Or for air flow stopping it’s not actually moving any air… that could be a vacuum leak somehow which would make your vents go to defrost?

  • @mr.anonymous41

    @mr.anonymous41

    10 ай бұрын

    @Hazardous-Hotrod-Knowledge thanks. I actually just put a set of new Promaxx cylinder heads on it. They work great BTW, new casting no weak points. It still does it. I have no coolant leaks now. I'm going on a trip soon so I can monitor it some more. If all else fails I'm re-doing the whole interior so I'll pull the box and rebuild it then. Thanks for the reply.

  • @mr.anonymous41

    @mr.anonymous41

    10 ай бұрын

    @Hazardous-Hotrod-Knowledge it's definitely has to do with the box. Fan still spinning but no vent air movement. I'll check the defrost when it does it. Thanks again

Келесі