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. 👍🏼

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!!!

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 KZread 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!

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.

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

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!

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

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!

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 !!

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!

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.

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!

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!

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

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!

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!!

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!!

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!

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!!!!

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!