Yay...heater not working... - JeepForum.com
Reply
 
LinkBack Thread Tools
post #1 of 18 Old 10-02-2015, 02:05 PM Thread Starter
robplumm
Registered User
2012 JK Wrangler 
 
Join Date: May 2008
Location: Newport News, VA
Posts: 849
Yay...heater not working...

All vents blowing cold. Almost to the point of feeling like the A/C is running (it's 65 outside right now...).

I've been reading on the heater core issues (Mine's a 2012 JKUR), but don't see any deposits in the coolant reservoir (did have to add to it...basically empty).

Anything else to check before taking it in? I'm over 3 years...but under miles...so...warranty is gone.

Other note: CEL came on. Using key, it cycles through and says "Done", but no codes. Just...change engine oil (that's been coming on for a while now, though...they apparently set it for about 3500 miles, it still hasn't been 5000 miles since last change, which is the interval I usually go with).

robplumm is offline  
Sponsored Links
Advertisement
 
post #2 of 18 Old 10-02-2015, 05:29 PM
Moezer
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2011
Location: calgary
Posts: 1,617
Check ur thermo stat could need a replacement how many kms
Moezer is offline  
post #3 of 18 Old 10-02-2015, 05:57 PM Thread Starter
robplumm
Registered User
2012 JK Wrangler 
 
Join Date: May 2008
Location: Newport News, VA
Posts: 849
34500miles...so...55k km...give or take a few hundred.

Engine temp seems to be fine, though.
robplumm is offline  
 
post #4 of 18 Old 10-02-2015, 08:04 PM
Moezer
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2011
Location: calgary
Posts: 1,617
Does the heat be w hot air when u driving?
Moezer is offline  
post #5 of 18 Old 10-02-2015, 09:18 PM Thread Starter
robplumm
Registered User
2012 JK Wrangler 
 
Join Date: May 2008
Location: Newport News, VA
Posts: 849
Quote:
Originally Posted by Moezer View Post
Does the heat be w hot air when u driving?
Nope. Cold air at all times from all vents, defrost, floor.

Really hoping it's not the heater core
robplumm is offline  
post #6 of 18 Old 10-02-2015, 09:33 PM
Moezer
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2011
Location: calgary
Posts: 1,617
It'd either coolant or thermostat
Moezer is offline  
post #7 of 18 Old 10-03-2015, 12:18 AM
christensent
Registered User
2014 JK Wrangler 
 
Join Date: Aug 2014
Location: Snoqualmie
Posts: 481
When you change to heat, do you hear the air flow sound change? You can definitely notice when the air flow is bypassed through the heater core, the air sound gets a bit louder at the same fan level. If you turn up the heat and hear absolutely no change (it takes a few seconds), then I'd say it's not your heater core, thermostat, etc. and is instead a computer problem or an issue with the servo that controls the air flow shutters.
christensent is offline  
post #8 of 18 Old 10-03-2015, 07:11 AM
Tireguy
Registered User
2009 JK Wrangler 
 
Join Date: May 2009
Location: Land of Lincoln
Posts: 235
You said you checked the reservoir (and had to fill it)...did you check the coolant level in the radiator? If its low, fill to proper level and recheck the heater function. If its full, run the engine to normal operating temp and turn the heater on. Are both the heater hoses warm? If one hose is warm/hot and the other is cold, you have a clog in the heater core. If they're both warm, the problem is somewhere else (air/heater control as mentioned above). If they're both cold, you have a cooling system problem (low coolant, air pocket in block, stuck thermostat).
Tireguy is offline  
post #9 of 18 Old 10-03-2015, 08:06 AM Thread Starter
robplumm
Registered User
2012 JK Wrangler 
 
Join Date: May 2008
Location: Newport News, VA
Posts: 849
Quote:
Originally Posted by Tireguy View Post
You said you checked the reservoir (and had to fill it)...did you check the coolant level in the radiator? If its low, fill to proper level and recheck the heater function. If its full, run the engine to normal operating temp and turn the heater on. Are both the heater hoses warm? If one hose is warm/hot and the other is cold, you have a clog in the heater core. If they're both warm, the problem is somewhere else (air/heater control as mentioned above). If they're both cold, you have a cooling system problem (low coolant, air pocket in block, stuck thermostat).
Checked radiator and reservoir levels...both look good, no sludge in cap (whew). Checked heat on both hoses to core...both very hot as they should be.

To above...completely forgot about how it transitions to heat. We don't use heat many months out of the year here but yeah...there's no slight pause or blower change when you switch from cold to hot.
robplumm is offline  
post #10 of 18 Old 10-04-2015, 01:12 PM Thread Starter
robplumm
Registered User
2012 JK Wrangler 
 
Join Date: May 2008
Location: Newport News, VA
Posts: 849
Alrighty. Apparently I'm blind...but not finding the A/c to heat actuator? Or is it the same one that shifts to the different vents (Floor, defrost, etc...).

ETA: Played with the one right inside the glove box to the left. That one apparently controls vent selector only...no broken teeth on it.
robplumm is offline  
post #11 of 18 Old 11-26-2015, 06:28 AM
rye5122
Registered User
 
Join Date: Nov 2015
Posts: 1
Heater core defect

I have the same issue - took it in to the dealer and it needs a new heater core and radiator flush. There is likely a manufacturer defect in the core, but they aren't admitting to it yet. The repair was quoted at $1,600. Luckily I bought an extended warranty and it should be covered. But I think Jeep needs to take care of this issue. My 2012 Wrangler has less than 40K miles, the heater shouldn't be going out!
rye5122 is offline  
post #12 of 18 Old 11-26-2015, 10:28 AM
Shabbernigdo
Registered User
 
Join Date: May 2010
Location: missouri
Posts: 114
Quote:
Originally Posted by rye5122 View Post
I have the same issue - took it in to the dealer and it needs a new heater core and radiator flush. There is likely a manufacturer defect in the core, but they aren't admitting to it yet. The repair was quoted at $1,600. Luckily I bought an extended warranty and it should be covered. But I think Jeep needs to take care of this issue. My 2012 Wrangler has less than 40K miles, the heater shouldn't be going out!
They have had issues with sludge building up in them and clogin them up. I read about it a few years ago and decided to flush out my coolant about a year after i bought the jeep. i ended up flushing out a bunch of pink slime had the consistancy of snot for lack of a better term. It had also built up at the bottom of the resivor botle as well.
Shabbernigdo is offline  
post #13 of 18 Old 11-27-2015, 08:49 AM
ccrane2299
Registered User
2012 JK Wrangler 
 
Join Date: Aug 2006
Location: alabama
Posts: 2,296
I had a 2011 with the same issue. Dealer said it had block casting sand in the heater core. I took the radiator overflow bottle off before I took it to the dealer and it had some slimey white stuff in the bottom. The dealer flushed it and I had no more issues. You'd think with the new motor they would have fixed it?
ccrane2299 is offline  
post #14 of 18 Old 04-04-2016, 06:40 PM
mrdeezus
Registered User
2013 JK Wrangler 
 
Join Date: Apr 2012
Location: Fair Oaks
Posts: 187
So, I'm having same issue and inside under center dash both metal tubes are hot and I hear no sound coming out of vent when switching to heat. Ill check radiator but if that's good maybe actuator or thermostat? thanks!
mrdeezus is offline  
post #15 of 18 Old 04-05-2016, 05:33 AM Thread Starter
robplumm
Registered User
2012 JK Wrangler 
 
Join Date: May 2008
Location: Newport News, VA
Posts: 849
Mine was the actuator that's buried behind the center console...cheap part...not cheap fix if you don't want rip the console out yourself...
robplumm is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome