JK Wrangler no or low heat fix. Blowing cold air left vent, heater core

JK Wrangler no or low heat fix
My 2012 Wrangler has had poor heat since I bought it a few months ago, the right vents would blow hotter and the left vent was cold, I searched online forums and found a few issues that other people had, like the mixer door motor or lever but mine was working fine. There is no heater valve on these JK's and JKU's! I took thermal images with my SEEK compact XR unit.
After all my research I came to the conclusion that my heater must be plugged. So I drained the anti-freeze system, unhooked the hoses to my heater core and flushed them both ways, hooked everything together and filled the system, warmed up while topping off the radiator, at this point I had NO heat at all, pure cold air, the pipes running to the heater core were also cold so I knew they needed to be bled out. I shut the Jeep off, pulled the top hose off and filled the hose until it ran out then reconnected fast, started the Jeep and BAM!, I had HEAT!! better than ever, all vents blowing scolding hot air!!
I hope this help others with the same issue, saved me from doing a heater core for no reason... phew!!
Also caught a video of the clean up of a rolled over 18 wheeler dump truck on rt 7 in New Milford... quite a bit of equipment to clean that up!
Work done so far:
I repaired the sway bar disconnect.
Found out the clock spring is under (extended warranty through Jeep, so it is replaced free if defective. So is the left cylinder head...
Mountain goat series 3” spring lift and some Joyroad MT200 35” tires. They work GREAT! This is the 2nd Jeep I installed them on (CJ7).
Skyjacker shocks installed
Part links:
Seek thermal smartphone camera: amzn.to/2jsp56p
3” Spring Lift goo.gl/C3DKX4
Skyjacker Set of 4 Shocks for Jeep Wrangler JK w/1-3.5" Front & 2-3.5" Rear Lift goo.gl/8JXA5e
4 35X12.50R17 D/8PLY 119Q JOYROAD MT200 MUD MT Tires: goo.gl/2xesny
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Memes: moist, terminator

[@Douglas-Ops]

MotoCheez, BOOM! You the Man! After 3 seasons of returning to the dealership and different garage, flushing, replacing heater coil etc. etc... YOU had the answer. Thank you for posting this and helping 1000’s of frustrated Jeep owners. A 3 minute fix did the trick. Much appreciated. 👍🏼

[@MotoCheez]

TY. 👍👍👍👍

[@coryiroks]

I second this.

[@newyorkdesignco.1533]

Dude, THANK YOU Brother!

[@xXApollo24Xx]

Great Video, have the exact same problem that Jack Nicholson in this video has.

[@MotoCheez]

LMFAO!!!

[@jasonallen6836]

Lol

[@Sinerwray]

I knew he sounds familiar lol

[@MotoCheez]

👍👍😄

[@jeffreygagnon5536]

Timothy Brown Va

[@philphalin7788]

Anyone having similar issue and you've got heat on one side and cools down to the drive side...it's more than likely air in your coolant line. That's typically even more so if you change anything that involves your coolant system (thermostat, water pump, coolant flush and even your oil cooler) Fill it up and make sure all your hoses (top and bottom) along with heater core lines. If all are hot or warm to touch, you should produce heat. Top off radiator while cool and reservoir and run to temp. Make sure fan kicks on at operation temps and crank the heat. If you can press the gas and the heat increases...continue to run while intermittently giving it gas to push coolant through system. After about 15-20 minutes...turn off engine and allow to cool. If the coolant level is low, with no leaks...add more and allow air to bubble out. Once the bubbles stop in the radiator...attach radiator cap and repeat process. Getting the nose of the Jeep up during this process helps as well. If heat temps improve...then what you're doing is working. Continue process until your heat is constant across your dash.

[@lornaleary2266]

I had been a bit over 6 months without heat. I had been told it was my heater door and it would cost $1K to replace the $30 part due to having my dashboard pulled. After seeing a KZbin video of a guy showing you how to replace the door without pulling the dash I helped my Dad follow the steps. I'm a professional flashlight holder. Anyway after removing the 2 panels under the steering we could see the door actually working so we put it back together and started digging deeper into what the issue was. Thankfully we found your video. We followed your instructions and happily I have that burning hot heat again! I bought my 2016 Wrangler new and now have 201K miles on it. I cannot thank you enough for posting this and by the looks of it helping lots of Jeep owners. THANK YOU!

[@MotoCheez]

Awesome! Glad it worked 😁👍👍

[@rachelo6673]

I’ve been having this issue since day one of when I bought my Jeep from the dealership 11 years ago. They keep saying there wasn’t a problem when clearly there was. Thank you so much!!!

[@keithgreene2007]

I always try and flush a heater core hefore going through the trouble of changing it. On these Jeeps, the core can be clogged and the hoses will feel hot too but will have cooler air on the drivers side. Youll probably eventually be changing that heater core. Its the main culprit for this issue. You got the air lock when you unhooked those hoses to flush it. Flushing it is what actually made your vents work again. You saved a lot of people a lot of money by showing them how to do this dude!

[@kylesabatini1048]

Thanks for sharing. This is exactly the same issue my wife’s 2013 JK is having. Blender door works, fan works, all the settings work. Cold on driver side, cool on passenger side. I’m going to try the last step in your video this weekend. I have to say I miss the TJ we used to own!

[@MotoCheez]

Let me know if it works!! Jeep should have had a recall on this. A lot of people same issue

[@LenSilvester]

Awesome tip!! I had the same problem for over 2 winters in Ontario, Canada. After -10c (14f) and as cold as -35c (-31), it was brutal having very little heat on the drivers side. This was the fix!!, I believe that air gets trapped in that return hose and doesn't come out during a refill or flush, because the high point of the hose is equal or higher then the top of the radiator.

[@jasonzatkovich4333]

Holy cow - THANK YOU. Ive been struggling with this for MONTHS.

[@Matt1110-t5r]

Literally. I just had this video playing while driving (not watching it!) and my heat started working!!! No lie! Haha it’s been out for a few months, couldn’t figure it out. Thanks!

[@MotoCheez]

Awesome

[@craigmitchels272]

My Dodge dealer would t believe me that there was air there. They blew the core out n put it back together. I already paid, so they blew me off! Thank you for the video

[@rockerlucky]

Good job man !! Just saved me and my girlfriend a thousand bucks!!! We almost got it fixed by the shop. Keep up the great work !! Cheers !!

[@MotoCheez]

Awesome! Thanks😁🔥

[@karenb7327]

Thanks for this video!! My 2013 has been doing this for a couple of winter's now. Been driving with blankets on my legs!!! Gonna try this and hope it works.

[@MotoCheez]

Let me know!!! I did end up swapping the lines on heater core

[@cbrown17982010]

It kills me that these problems are only noticed once it's really cold out. Its finals week and I've been leaving the library at 2am whens it's also 14°f out. . . .gotta do this to my 2013 jkus next weekend. Thanks for the awesome video!

[@MotoCheez]

Agreed.

[@Taikoknot]

You just saved me quite a bit of money!! Looked up a bunch of vids and this is the one with the fix for me. With a week straight of -20C (-4F) this is a blessing for my body as much as my wallet. My 13 Wrangler and myself thank you!!!!

[@MotoCheez]

+Taikoknot awesome!!!

[@amandasuewatts3693]

Thank you!!!!! I’m a hospice nurse and I’m in my Jeep all day everyday and I can not handle snow and ice freezing up on my windshield!

[@MotoCheez]

Awesome!

[@richensby5888]

You are a legend thank you for taking the time to do this, I have been scratching my head over this for weeks !

[@MotoCheez]

Thanks! Glad it worked!!

[@marissanelson7546]

I have a 2012 Jeep Liberty with all the same issues you described about your Jeep. I did this tonight after getting a coolant flush with no luck and finally coming across your video. it made my heat start to work!! But it was still struggling to pull the heat fully so I unhooked both hoses and blew them out with an air compressor like a similar video I watched. I believe doing both of these things was the trick! My heat has seriously never been hotter thank you so much for posting. I never write comments on anything but this was so helpful to me and I didn’t see any comments on different Jeep models so if anyone is wondering if this can work for your Jeep that isn’t a wrangler and you don’t wanna spend a ton of money well it seriously works!!

[@MotoCheez]

That's awesome! Thanks for sharing

[@TheLosiracer]

I just flushed my coolant system and it was blowing cold air and I did what you said and it fixed my problem. Thank you so much for taking the time to make this video!!

[@bhudson123]

Thank you MotoCheez, I have a 2012 Unlimited with only 38K miles. I flushed my Heater Core using a sump pump and got a few bits of that casting sand that people are talking about. I also cleaned my reservoir tank which had sludge in it, but not much sand. Flushed the radiator and turned on the petcock valve to drain it. It does take some time to refill and burp the system, you have to leave the radiator cap off until the engine gets hot and the thermostat opens and you have to squeeze the large hose that's on the top right of the radiator to get the air bubbles out. Drove it around a few mins, then refilled the reservoir tank. The last thing I did was your trick of removing the heater core hose and filling it until antifreeze came out of the aluminum pipe. Drove it hwy speeds and got hot air. Still hotter on the Passenger's side, but so much better than before. I need to remove the other heater core hose and fill it as well. I think this summer I'll spend more time flushing the entire system really well to get any bits of sand out. The sump pump is a great way to recirculate flushing cleaner, CLR or whatever you want to clean the heater core out with. It's low PSI. I did both, but didn't leave the CLR in there for long. I think with this crappy design from Jeep, you just need to flush, fill and burp often. I too would like to see a video on how you reversed the lines. Thanks!

[@MotoCheez]

I never did a video when I reverse the lines but since I did that it's been much better even the heat out of the left vent was always a little bit colder and it still is slightly but it's like way better

[@arthurkallis]

Thank you for your help, just in time for winter. You're the man

[@slopsec2358]

That congeal crap in your bucket is from mixing non-Mopar coolant in your system. You can use non-Mopar, but you have to flush it all out first and then use the other stuff. Never mix. Also, there's a (or should be) small value on your thermostat housing for bleeding air after adding coolant. That should prevent this from happening. Good video, thanks.

[@ccornetto]

Holy shit man. That really worked! Thank you.

[@MotoCheez]

Awesome!

[@caitlingrey5847]

Thank you for this video! Been dealing with this for two winter seasons and mechanic won’t listen to me just does what he wants to do. His fix will last a day and then I’m back to being cold. Will be doing this myself today!

[@MotoCheez]

I seem to have to flush it about every 2 years, but it works!

[@gwkdad]

Ha! I just test drove a 2013 JK Unlimited yesterday with this exact same problem. No heat through the left vent. Thanks for posting this!

[@robertguest3046]

Nice job!!!

[@OneWithTheDark]

Dude you're a rockstar. Thank you!!!! I no longer shiver when driving my Wrangler. Air in the system was apparently causing circulation issue. BOOM. Your video was the fix!!!

[@MotoCheez]

Awesome!! Thanks 🧀🧀🧀

[@OneWithTheDark]

@@MotoCheezI had the issue resurface this year… flushed out the entire system. It had a lot of sand in the core. While I was at it I picked up a “Peak Flush Kit” and installed the 5/8” T fitting in that hose that you pour coolant into in your video… the T fitting makes it real easy to top off the coolant there at the highest part of the cooling system. It also eliminates fluid loss when trying to reconnect the hose. You can even use a funnel in the T fitting. The kit was like 6 bucks. Worth it. The heat is working better than ever before. Thanks again for this vid brother!!

[@jeffreyruiz9870]

Great video! This helped with my troubleshooting. Both heater core lines were hot. Based on the video you indicated looking at the actuator, there it was. Actuator was stuck. Fyi, you can remove the driver side air duct to get at the actuator. Thanks again!

[@MotoCheez]

Awesome. My actuator is clicking on that side so I'll be doing that soon!

[@loujones8583]

Great info. Thank you for sharing. The pace of your explanation is perfect!

[@MotoCheez]

+Lou Jones Thanks! 👊

[@samtalbert468]

Thank you soooo much, I was freaking out about it this morning when mine stopped working!!!

[@jedhardy5848]

Great video. My wife’s 2013 had the same issue. Came across your video did the same as you, got bad ass heat now. Northern Kansas. 🍺

[@MotoCheez]

Awesome

[@kjhaglfjhgfasd]

Amazing, I have been messing with my jeeps heater all summer trying to figure this out, because last winter was pretty awful, even here in california! This fixed it boom pow just as stated.

[@MotoCheez]

It's crazy, right

[@deerhunter72002]

Oh man, I have the exact same situation down to the tee. Even my fluid was a low and had the same issue with the vents EXACTLY.I feel like this is the solution to my problem. Thanks for the video.

[@MotoCheez]

Nice. Let me know if it works!!

[@ibreu8922]

Had no heat, watched this video, went out & just pumped that line with my hand & now I have heat!!! Thanks

[@MotoCheez]

Mine still working too, but I reversed the lines after it acted up a year later.

[@juliorodriguez5158]

MotoCheez could you give us another video to the follow up to this one on how you switched the lines? Thank you so much for the knowledge! I have a 2013 JK with same issue now. Very luke warm air coming out from the middle venta. Colder air coming out on the two end vents.

[@MotoCheez]

Ok. I should!! Only thing I had to was use a 1/2" 90deg elbow and a short line to reverse hoses...

[@juliorodriguez5158]

MotoCheez thank you! If you have time do a little quick short video as I’m a better visual learner. Just want to make sure I do it correctly. Thank you!

[@vincequelmar]

Holy Sh....!!!!! This worked !!!!! Freaking Awesome , Thank You !!! You probably saved me $1500,00 , I primed heater core return hose the same way , Thanks Again !!!

[@MotoCheez]

Sweet!!!!

[@sstownttstow2269]

I have a 2011 doing the exact same thing...I've tried flushing aswell.....My top hose goes to the thermostat...is that the one I should try to top off?...Thanks

[@MotoCheez]

Yes, the highest hose... I actually swapped the hoses because it seemed to be blowing less heat 6 or so months ago, blowing HOT still and it was 9° out a few days ago...

[@sstownttstow2269]

Thanks for the quick response...Imma try this tomorrow..Hopefully it works, if not, I'll try swapping directions...Thanks again

[@sstownttstow2269]

Lol, watching you describe how your heat was acting is ecaxtly how I am trying to figure this out...I get real annoyed when there's no obvious problem..bout sick of this phantom heat situation!!

[@Kerryclement]

God Thank You I've been trying to figure out why mine is doing this same thing. The dealer wants $2K to replace the heater core. And from your description of the problem I think you just saved me $2K. THANKS! I'll post again if this fix works for me.

[@MotoCheez]

The heater core gets plugged partially so when you do the flush and then burp the air out of the hose it should definitely work again. If it's not that then it's the blend door or something to do with that. I'm surprised they don't just offer a heater core flush

[@franciscovera7813]

Perfect video nothing I would have changed to make this video any better especially those funny pictures 🤣😂 definitely made my day a lot easier👍🤟🏽

[@TrueOne93]

Thanks for this video. Have mine blowing cold air instead of warm too

[@kb-ym2mu]

My jeep had this same issue...no heat after replacing a thermostat. I did what this vid suggested and it solved the heating issue. THANK YOU!!!!👍

[@MotoCheez]

Awesome!

[@shawnhollahan590]

I bought my JK used in Florida where its warm... first trip I did was a drive to texas in 25 degree weather where I discovered I had the same exact issue... intermittent barely luke warm heat, higher on passenger side and nil on drivers side... then I drove cross country to california in november....no heat again. Thank you for this post.. I'm hoping you solved my issue !!

[@MotoCheez]

I had to back flush again at about 12k Mike's. Got some more sediment out, this time I reversed the hoses. Red hot heat for a while again.

[@juliorodriguez5158]

MotoCheez so how are things going with the heat? Any updates? Thanks for sharing the knowledge!

[@MotoCheez]

Heat still works great, I flushed last year again and reversed the hoses because it seemed like wasn't blowing real hot.

[@regularguyfixes3142]

@@MotoCheez which hoses are you reversing? I guess it doesn't matter which way it flows it will just break loose any clogs I guess.

[@MotoCheez]

The ones that go thru firewall, but if you flush it good enough it doesn't matter

[@Himanshu_Sihmar]

I have a 2015 jku and it's -49 f today and my heat just stop working, no heat at all but my temp gauge is normal I am thinking to try that before going to the dealer.

[@MotoCheez]

No heat at all? Make sure you're antifreeze is full and the hoses are hot to heater core. Sometimes the blend door is the issue.

[@ronervin9865]

Props for my man MotoCheez! I had the same issue on my 97 Wrangler. A good flush of the heater core this morning produced a lot of dirty liquid, confirming a blocked heater core. Alternated flush direction numerous times until the flushed water was clear. The heat is perfect now and winter will be no problem this year. Happy Thanksgiving and appreciate the fine video.

[@MotoCheez]

Thanks! Happy holidays

[@ribbs67]

I have heard that doing a flush to clean the heater core, and then reversing the heater core lines will let the water pump continue to reverse flush sediment out or the heater core.

[@MotoCheez]

I did that

[@bigalb8935]

Thanks for the info going to try this on my 2012 jk doing the same thing

[@MotoCheez]

I just backflushed and got more goop out of it.. heat was slowing again, now perfect again.

[@LifeSavingDefense]

green vs orange I pulled the top hose off a 2000 chevy and the hoses have a pretty thick dry layer of the orange stuff thicker than my finger nail lining the bottom of the hose that I can flake off. I’ve never seen any other coolant do this. The most important part about coolant is the metal reactions with the coolant and water which is why normal hose water is bad and we “should” use distilled water that everyone keeps in our homes and trunks, right? That’s partially why most coolant directions say 50/50 or your fooled into paying double for premix . The coolant also supposedly lubricates the water pump. I dump and flush the orange garbage not because it doesn’t work as a coolant but because of what it does to the radiator, water pump and hoses. Also if you have a pressurized coolant system with no over flow this causes head gasket leaks so I change those as well.

[@MotoCheez]

I've heard not to mix because of the gel.

[@Bulldog44s]

I have a 2013, no heat. First of all, the blend door motor is not something that can be heard when it is working, at least not in my Jeep. Make sure you actually can see it working (or not working) before you actually take it out and replace it. I thought my wasn't working, but after gaining access, I could see it actually was working fine. The fix was to flush the heater core by back washing it. Next I flushed the radiator and refilled the system. The Jeep seems to have a little trouble self burping, but once it clears out the air in the lines, the heat came right back on, good and hot. It took a while to diagnose the problem and it is a little trial and error before you pinpoint the problem, but my guess is that if your overflow/reserve tank ever ran low on coolant, you may lose heat. And just refilling the reserve tank doesn't fix the problem. You need to flush out the system and put new clean fluid in the system and the heat should come back on. Try this first before letting the stealership get their hand on your ride.

[@toddthomas110]

Nice video! Straight-forward! Perfect personality for someone with not a lot of time to waste!

[@MotoCheez]

Thanks!

[@SportbikerR1]

Wow thanks alot I had this problem too and everyone was like replace the heater core, which i did and the problem still happened. I was not impressed so I checked this and yup. Just wish now I never spent that money to fix the heater core.

[@MotoCheez]

Crazy! Worked for those without a leaky core

[@killerofkingz8536]

My 09 wrangler is doing that right now I replaced the thermostat but that didn’t help I’m going to try a few tips from the video and see

[@billburke1506]

2012 JK sport here..only 17k miles heat just stopped being hot this winter..used to melt your face now I am only getting 91 degree air from drivers side vent and slightly warmer from center vents. I checked blend door actuator it is working properly....I flushed heater core both ways (no sand or gunk came out) could blow air with my mouth through heater core so no restrictions, refilled and bleed system with front end up on ramps with the reservoir that attaches to radiator cap....thermostat opens and upper radiator hose is filled...ran it for 15 mins until no more air bubbles....closed radiator and ran on street for 15 mins came back home and all levels are full...still luke warm heat.....if I IR gun the metal tubes going to and from heater core they are only 105 degrees....I pulled upper heater core hose off of and it was pressurized and squirted coolant. I IR gunned the thermostat housing and it was 199 degrees so the thermostat is working. When the thermostat is closed the water pump HAS to be circulating water through block and to heater core right? where the hell is the hot water going? is it all bypassing to oil heat exchanger and bypassing my heater core?

[@MotoCheez]

Hmm yeah that's crazy. I'd almost say your blend door was not working right, but you have low temp going into the heater core... Chrysler should definitely recall these JKs for the heater core issues, I see hundreds of people commenting her about it.

[@gor6262]

I had the same issue and figured to "change" the position of the high point of the return hose just by driving on 2 20-25cm bricks on front tires, and let it cool down completely, then when its cool you open radiator cap and refill the antifreeze. You can park the car on really high stip and do the same

[@MotoCheez]

I did park on that ledge next to the Jeep and try it. Would t burp out.

[@armstrongbuttonsging]

Woooow thanks brother can’t believe this worked…great voice too lol

[@MotoCheez]

Awesome!

[@duanevigue1603]

This is a lack of burping the system properly. You get an air bubble in there and you dont get super hot heat and on top of that, you risk burning up your head gasket. The system HAS to be full at all times. If you put your front tire on a ramp that lifts the side of the engine with the radiator cap, then use a no spill funnel to fill the system with coolant WHILE the vehicle is running AND the heat is turn on as high as it will go, it will cycle the coolant throughout drawing in the new coolant from the funnel and at the same time burping out the air bubbles. Sometimes burping a system correctly can take an HOUR, but its WAY better than no heat in a cold climate or a burnt out head gasket. Keep your eye on your coolant levels folks.

[@demetriusthomas2048]

Excellent video million dollar answer for the million dollar question you sir r a winner thank you for your help

[@wutmoney3262]

I got the same problem. I'll try it tonight

[@daniellyle-i4k]

Thank you it worked for ours like a charm

[@MotoCheez]

Awesome!

[@bravobullz7475]

Identical problem I’m having thanks man

[@marks9897]

Awesome, thanks for making the video

[@gonzotom78]

Similar after I change thermostat. Going to try this

[@thedrivethru9667]

You Changed My Life!!!! Thank you! Thank You! Thank You! Works like a charm!!!

[@atomiclife9900]

Same problem with JKU 2014after a flush. Thank you for the help.

[@khcopter]

Thank you for your video that wasn’t my problem but you pointed me in the right direction

[@MotoCheez]

What did yours end up being? Blend door?

[@fresh5010]

Been having issues with wife’s wrangler same issue has warranty but 250 every time it goes to get fixed had heater core replaced worked fine for 2 days now having same issue again ima show the idiots at the dealership your video

[@MotoCheez]

Had a few people show the dealers lol. It probably has an air pocket if they put a new heater core. Hopefully not the mixing door

[@ketodad]

I tried back flushing the HC and system , and had the same problem.. All you did was put coolant in the Heater core line ( till full) , and that's it ?? You did that AFTER filling all coolant levels , right ? I will try this and cross my fingers !

[@MotoCheez]

After I flushed it both ways yes and I filled it all the way to the top so there wasn't an air pocket

[@ketodad]

Thanks man. I'll give it a go in about an hour and see how it turns out. Northern Canada here , so need more heat ! Pete@@MotoCheez

[@nathanfranc168]

Awesome video bud ! Made my day so much easier!! Had the exact same issue and your video helped me solve it !!

[@dupreezkillian7303]

Simple but effective. Thank you.

[@DeathScouter]

My JK just started doing this a week ago! What do you think was the "real" problem? Did the antifreeze flush fix it, or do you think you somehow formed an air gap in the heater core lines?

[@MotoCheez]

I feel it's the heater core plugging up from mixing antifreeze types. Just had to do it again on this jeep. About every 2 years

[@BaljeetSingh-im9be]

@@MotoCheez ​ hi pls help me. My english not very good could u tell in simple words but you did i have same problem.thank you in advance

[@MotoCheez]

I believe it's blockage, either sand casting or mixed antifreeze gelling. I had to flush again and it worked.

[@thelandrethfarm4782]

Thanks for the help, fixed my problem! 👍🏾

[@demitriyannitsos3731]

literally have the same problem thanks so much

[@christianwerner7183]

My heater core was flushed about a year ago and I had heat for about 3 months and then the driver side went cold again. Do you think I have to flush it again and poor it directly into the tube or can i just skip the flushing process and poor it directly in the tube. Thank @MotoCheez

[@MotoCheez]

I'd flush heater core again it, never know if it had more crap in system

[@christianwerner7183]

@@MotoCheezSounds good thanks for responding man!

[@sewingmachinetipsandtricks9079]

Thank you, I have that exact problem. It will be fixed today!

[@BrandoLaBs]

Dude, I've got the same damn problem and the STEALERship is trying to nickle & dime me for an entirely new heater core. I'm hoping that using this method can help me out. It's friggin -5 in Minnesota and I can see my breath while I'm driving into work everyday.

[@MotoCheez]

+Brando Labs good luck! Almost everyone who has given feedback sofar it has worked, even after the dealership changed the core, it acted up 2 months later.

[@RudyHelton]

man I have been going crazy .... thanks

[@theundead1600]

Sounds just like my issue then I get a thermostat code. But it’s -3 today. Jeepnsits take the wife’s car for a bit lol. Thank you . I’ll be doing this in a few weekends.

[@MotoCheez]

Good luck! Hope it works for you

[@matt8863]

5:19 "G-05" not G-2...Great video man,..Thanks!

[@MotoCheez]

Thanks!

[@ReachAndGetIt]

Omg! Thank you so much my 2013 has been having this problem for 2 years. It had been overheating and we changed out the heater core using the hack, not by removing the entire dash.($100 vs. $700) Even after that the heater still did the half hot half cold thing. Today its overheating again & I have no clue why. I'm going to flush the radiator & heater core to see if that helps along with everything else you said here. Maybe something is stuck in the lines.

[@MotoCheez]

The antifreeze that comes with these Jeeps back then ends up congealing just like in my video and it plugs that heater core up don't mix your antifreeze when you put antifreeze in make sure it's the same type to prevent that in the future after you flush everything

[@ReachAndGetIt]

@@MotoCheez thank you

[@mikeedwards9240]

Mine doing the same thing..will try what you did.

[@MotoCheez]

Let me know. Helped a lot of ppl. Make sure you flush and back flush

[@davidblankenship7599]

I’ve got that exact problem thank for the video I’m gonna try this

[@MotoCheez]

Lemme know if it works

[@RodViramontes]

I have the same issue on a 2017 JKU. I've taken to the dealer twice; they've reset and flushed. The heat is very hot on the center but luke to cold on the bottom and sides and cold defrost. I don't even want to bother. At 3:26 in your video did you relieve the pressure while hot? Can you clarify a bit? Thanks. Good video BTW.

[@MotoCheez]

The highest hose

[@kellyfoust3007]

Can I skip all off it and just pull the value and put the antifreeze in the line?

[@MotoCheez]

You could try that, but I think the main issue is trying to get the heater core flushed. If you flush it you can see if there's any of that gel blocking the heater core

[@kenneth24castle]

Awesome video man! I think this is what is going on in my 2010 as well. Really appreciate you posting the information! I wonder what cause the problem in the first place though !?!?!?! weird!

[@MotoCheez]

+kenneth24castle thanks! I believe low coolant causes the air lock.

[@Damonkeyspanda]

Dude. THANK. YOU. X2 on the legend.

[@baltazarcastillo661]

Awesome video! Mine is doing the exact same thing. So just to get this right, the heater hose, the right one disconnect and fill up with antifreeze and connect back real quick? 3:42

[@MotoCheez]

I would flush it back and forth too because I got some gel out of mine, and then top it off up there so there's no air

[@sidneycoakley1524]

14 JKU. Mines just blowing straight cold air with the dial turned to heat, even after 2 hrs of driving. I seen another video I’m gonna try but this will be an very good 2nd option.

[@randymccain8556]

What ended up being the issue??? I have 2014 jeep wrangler doing the same

[@MotoCheez]

Heater core plugged. Flushing and bleeding solved mine.

[@1lesa242]

Thanks! Going to try this

[@davidhanger5795]

I have the same problem with my Cherokee. This may be the cause. I'll check.

[@MotoCheez]

Let me know! Works almost 100% of the time

[@guidoviana7985]

Awesome thanks, that worked for me also

[@MotoCheez]

Awesome!

[@danielledenman8542]

Thank you for sharing this!

[@MotoCheez]

👍👍👍👍

[@VideoAmazed]

MotoCheez.......I'm working with wife's 2014 Jeep Wrangler Sport about poor heat. She took it to a repair shop and they flushed the heater core and I think the radiator as well. Still low heat on Driver's vent. I'm unclear what was the cause ? Did you conclude that the aluminum tubing that runs to the rubber hoses to the firewall had an air pocket in it and needed "primed" ? I wonder why the water pump didn't push fluid on past the aluminum tubing ? I'm not clear on what the cause of the air pocket was and why the need to "prime" the tubing ?

[@MotoCheez]

Hi .i have no idea why the air will not push out of the hose, poor engineering I guess, mine still works, but the far left vent cooler than the rest but still hot. I always wanted to put a tiny bleader hose T on the upper hose back to somewhere to keep it siphoned off. Some older Japanese cars had them.

[@VideoAmazed]

@@MotoCheez I am presently watching it very closely. The blend door lever is operating properly and the plastic gears don't appear to have been stripped. I did find that the black plastic duct tube wasn't secured It could be a defective thermostat. I have done extensive research about NOT mixing OAT with HOAT type antifreeze. Chrysler after 2013 used OAT in their new vehicles. I'm very cautious on what specific type of antifreeze I will be adding to the system. I suppose it would be OK to change the type of anti-freeze but a thorough drain and flush.....just don't mix OAT and HOAT together.....from what I've read.

[@MotoCheez]

There's a rubber flap on the inside of the blend door that comes loose on some from what I've heard from mechanics. but I don't think that was my problem it may be a little worn so that is why I think I have a temperature difference but mine still blows hot air. Now I definitely don't like to mix the two, but everywhere you look on Preston's website they say it's universal. I don't know but I've seen it coagulate

[@VideoAmazed]

@@MotoCheez Did you by chance ever loosen the air bleeder valve screw down on the thermostat housing to "burp" the system of air during your troubleshooting process.

[@MotoCheez]

No, because with my temp gauge I saw the air up in the hose, the hose near Tstat was hot. they told me at the Jeep dealer the way that they get the air out of the system because those hoses are so high, is a use a vacuum to pull the air out. apparently that doesn't work that well or they don't know how to use it

[@Poot-sq6uf]

Thanks for the vid! I'm having the same problem , this weekend I'll check that. 8 have a 2010 two door Rubicon

[@MotoCheez]

Good luck! Mine still working. Was -4 here this morning, was keeping up with it. Not like before, I froze!!

[@vinceguarino9145]

NICE! 👍🏼 WHAT YEAR IS YOUR JEEP?

[@MotoCheez]

This one was a 2012 MW3 Rubicon. I just got a 2020

[@mozes42]

Did your check engine light come on with this issue? Our’s is doing the exact same thing, but we’ve got a check engine light on too.

[@MotoCheez]

No not didn't come on

[@nicholasmark5431]

Ok I’ve done everything in the video guys. I have a 2012 Jeep Wrangler. I flushed the heater core. New thermostat. Added antifreeze. Left side not hot after adding antifreeze to the top hose. Actuator opens and closes. Could the Actuator still be bad. Min don’t unless it’s all the way hot and all the way cold turned down. If I put the temperature half way it dose not move at all. Has to be all the way hot or cold before it turns.

[@MotoCheez]

Sounds like it could be your blend door causing the issue... If the hoses are as hot as the radiator hose is off your engine then I'd say it is your blend door

[@nicholasmark5431]

@@MotoCheez I also noticed that I don’t have any cab filters. Bought the jeep in October. It’s a 2012 wrangler sport. Also there was a white plug unhooked to the right side in behind the speaker where the cab filters are was not plugged in. Not sure what that was but I plugged it up.

[@MrBarfly34]

Having same problem with my 2011 wrangler... you suggest the first thing I try is filling that top hose with antifreeze?

[@MotoCheez]

You can try, but back flushing was the fix

[@kordax25]

The congealing that you are seeing is the fact that you are mixing regular antifreeze with HOAT antifreeze they put in it from the factory. If you look into it, part of the side effects is congealing. You need to flush the entire system and put in HOAT antifreeze. I think this was 2013s and above but can’t be sure.

[@MotoCheez]

I believe you're right. I did flush the system and put non HOAT in this time around. Never know what others did before me either

[@digmoe6463]

Thanks man I appreciate you

[@keiththeisen9781]

Agree, great narrative.

[@cduemig1]

Thanks! Same issue.

[@jakeurbano8268]

Mine just stopped working out of no where..its been hot lately where I'm from 105° but it was pretty cold when I had to drive up to oakland for a few nights so I needed the heat. Will check when I get off of work to see if this is the same issue happening with mine.

[@MotoCheez]

👍👍

[@regularguyfixes3142]

Dude this is exactly how my daughter's jeep is.... Cold on that left vent hot on passenger. We also have a Lil syrup smell as well. I wonder if we jump right to the last tube fix you did wud be all we need to do.

[@MotoCheez]

Worked for a ton of people! Good.luck