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Unread 12-26-2012, 04:49 PM   #46
jstrubberg
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Quote:
Originally Posted by nickmonaco View Post
Hey guys thanks for all the useful info. I'm hoping this thread is enough evidence to take in and prove the dealership wrong. It's strange though, now since I got the jeep back, it's a little better, only does the half hot/half cold thing about half as much as it uses to. But it constantly fogs up my windows now. Ill turn on the defroster and wait for the condensation to clear, then switch back to vents and then I get freezing cold air again... Also getting that syrupy antifreeze smell. So is my problem most likely a bad heater core AND the little door too?
Yikes. Antifreeze smell and fogging would indicate a LEAK. Did they replace the core when you took it in? It's possible they didn't get a clamp tight or something.

Be careful. If you're smelling antifreeze, you're losing antifreeze.

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Unread 12-27-2012, 09:59 AM   #47
WXman
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When I first got mine back, I also had fogging and antifreeze smell. In addition to that, when I turn the controls off after using the heat, and I'm sitting still idling, I can hear "drip, drip, drip" behind the dash. I pulled my glovebox out and inspected with a flashlight. Looks dry as a bone. Felt around under the heater core and the carpet is dry. My smell has since gone away and the windows don't seem to fog abnormally anymore.

I have read that the manufacturer of the radiators was putting stop-leak in them to plug defects and get them to pass inspection. This stop-leak additive is then clogging up the heater core. This is the kind of stuff that kills Chrysler's reputation. They were doing so well for several years...now they'd making junk again.

I so far have not had the failure of engine heads issue. If that happens, the vehicle is gone.
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Unread 01-12-2013, 10:27 AM   #48
nickmonaco
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Update!!!!: I had to drive across Tennessee to do it, but I found a mechanic at a dealership who knew what he was doing. I got my heater core problem fixed. Everything's fine, I still hear a drip drip sound behind the dash though. No fogging. Oh, the bastards broke my shifter knob, so I made them order me a new one.
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Unread 01-15-2013, 03:21 PM   #49
LimitedHemi
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What was the solution? I recently had some fogging and the smell of antifreeze but it turned out to be a loose hose clamp from when they repaired the notorious head issue. My heat is starting to occasionally blow cool on the drivers side lately. It's inconsistent though. I have a 2012 JKUR and I'm getting close to 36k miles...
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Unread 01-15-2013, 03:45 PM   #50
nickmonaco
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Mine started out only doing it occasionally. Then I couldn't use my heat at all without fog. So I would use the defroster, then after a while I had warm moist air from the pass. side, and cold on my side. I got pushed around by a few dealerships but eventually found one with a good mechanic. I had my heater core replaced last Wednesday and have been driving around in the 19 degree weather as toasty as can be. I also had my radiator and cooling system flushed about 4 times. So I think all the nasty casting sand left over from production is out of my engine. But the old heater core was still clogged. Now I've got the new one, and (knock on wood) so far everything's perfect and functional. I forgot how good the Jeep's heater was. Good luck I hope you get it taken care of quicker and more easily than myself.
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Unread 01-16-2013, 08:25 PM   #51
ICT-JK
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Had the same problem, it's the heater core. Before the motors are built they sand blast them with a real fine sand, if they done rinse out all the sand it goes into the heater core and stops it up. Had mine replaced at 8k, works fine now. It's an extensive job, whole dash comes out, they even have to take the gas and brake pedal out????? Idk
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Unread 01-17-2013, 04:31 PM   #52
nickmonaco
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That's what I told my dealership. They told me I abused it somehow and the fix wouldn't be on chryslers dime. F them.
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Unread 01-26-2013, 01:43 PM   #53
tomlennon
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Cross posting - worth sharing.

Same problem. Heater dying in 2010 JKU with 29k mi. Popped the radiator cap off after looking at this thread. To my amazement - there's a bunch of SAND stuck to the bottom of my cap. I'm sure my heater core is clogged solid.
Any word of a remedy/admission from Chrysler? I'm nearing the end of my warranty. Beyond the heater core - what else should be replaced to guarantee the sand stays on the beach where it belongs? See below



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Unread 01-26-2013, 09:48 PM   #54
nickmonaco
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Just go to a few different dealerships and tell them EXACTLY what the problem is in a very confident tone. if they want to know why you think its your heater core, tell them you get fog on the windshield, and it blows cold on the left two vents.and that you NEED a heater core replacement and a very thorough cooling system flush. I got lucky at the third place I tried and found a mechanic who used to build CJ's in Toledo for AMC. He hooked me up. I wish you luck, it's a pain in the ***, expensive job, and I think that's why the two other places I tried wouldn't help me. Keep any updates posted on this thread. Someone might find it useful.
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Unread 01-26-2013, 09:49 PM   #55
nickmonaco
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Oh yeah, and last I checked Chrysler has nothing to say about this...
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Unread 01-26-2013, 10:53 PM   #56
JIMBOX
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My '08 sub-zero outside--

The heater never has to be left on, it is so FRICKIN hot--

Now the tranny stock oil cooler (), has nothing to do with the radiator, it's employed in the A/C condenser bottom section--

Now unless jeep has redesigned that system also, it still uses the A/C condenser and thats why they started installing aux coolers (STOCK)--

The inside of my jeep can be comfy warm in less than 5 minutes, when it's freezing outside-

I'm sorry about your heater problem, they've been legendary eversince '07-

Good luck

JIMBO
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Unread 04-24-2013, 10:01 AM   #57
CrawlingForward
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Ok, so I never got around to full investigating the issue until *after* our warranty expired.

Our heat *occasionally* works really well, but often is lukewarm at best.

If it's the sand issue (I'll check the radiator cap at some point), is replacing the core the only solution? Or will a really thorough bunch of coolant flushes alleviate the issue?
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