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Unread 12-06-2013, 05:16 PM   #16
mrcangi
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well for an update I put a new radiator in today I flush the heater core with CLR and my air compressor. Didnt get any chuncks or any bad stuff out of it. I put a brand new thermostat in again. The heat still is not as warm as it should be. When driving at normal highway speeds the temp guage is between half a d the first line under half. All the hoses are hot. New water pump. Mew cap. Fresh motor. Self sealed blend doors. Not sure what else it could be. Unless my seal on the blend doors is not good enough?? Any more ideas?

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Unread 12-08-2013, 09:03 AM   #17
mrcangi
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Any ideas? I dont know what it is. Its not even driveable anymore. It wont even keep the windows unfogged when driving when its this cold out. Heater core plugged sum were in there? Something is not right
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Unread 12-08-2013, 09:11 AM   #18
greeky510
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Until you are able to try and take the dash apart to completely fix the doors try and turning the ac on while your heater is on hot. This will help remove moisture from inside the cabin.

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Unread 12-08-2013, 05:06 PM   #19
mrcangi
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Gonna order the blend door repair kit from blendoorstore.com tomorrow. Replace it just to check one more thing off the list that might help. If it dont fix it then at least ill know itll be fixed and will last a while. Hope its not the heater core
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Unread 12-08-2013, 11:05 PM   #20
rdkendrick
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Quote:
Originally Posted by greeky510 View Post
Until you are able to try and take the dash apart to completely fix the doors try and turning the ac on while your heater is on hot. This will help remove moisture from inside the cabin. Sent from AutoGuide.com App
When the selector is on defrost, the A/C IS on. That is what defrosts the windows, not the heat,(well, it helps, some) the dry air.
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Unread 12-09-2013, 09:14 AM   #21
mrcangi
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Would it matter it my ac compressor is unplugged? The compressor locked up so I got a used one and just left it unplugged till spring and ill replace it with a new compressor and get it flushed out and
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Unread 12-09-2013, 09:23 AM   #22
pabstman
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Wj

I am having similar issues on an 04 V6. I notice my radiator fan isn't running, even with the A/C on. The A/C blows cold air, the engine temp is normal, but the heat is just air or midly warm air. The radiator fan should run with A/C on and with defrost on, correct?
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Unread 12-10-2013, 01:56 PM   #23
mrcangi
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I know mine kicks on when it needs to. But the temp dont hardley get up to half way. Its closer to one line under half. I ordered new blend doors yesterday. So ill get them in by the weekend and go from there. If they dont help then I guess I have to change my heater core
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Unread 12-13-2013, 05:29 PM   #24
mrcangi
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Looks like im changing a heater core. Any advice??
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Unread 03-12-2014, 09:13 AM   #25
bwiygul
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Hey man I know this is a few months old but did you ever fix it? I have a similar problem except mine is perfectly hot on vent but not as hit in defrost and even worse on the feet. I also don't have much pressure blowing on the feet or defrost either. Just wondering if you checked all modes and stuff too or if the heater treater fixed it?
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Unread 03-12-2014, 09:52 AM   #26
rdkendrick
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Quote:
Originally Posted by bwiygul View Post
Hey man I know this is a few months old but did you ever fix it? I have a similar problem except mine is perfectly hot on vent but not as hit in defrost and even worse on the feet. I also don't have much pressure blowing on the feet or defrost either. Just wondering if you checked all modes and stuff too or if the heater treater fixed it?
Was your blower resistor replaced? It has longer fins. Compared to the old one. If it did, it might just be a matter of switching the wires. See this thread: http://www.jeepforum.com/forum/f310/.../#post12445860

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Unread 03-12-2014, 10:54 AM   #27
bwiygul
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Would that matter between modes? I haven't done that resistor. Seen a few threads mention it but haven't dug into it. Figures it was a pass or fail thing for a resistor.
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Unread 03-12-2014, 11:27 AM   #28
rdkendrick
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Quote:
Originally Posted by bwiygul View Post
Would that matter between modes? I haven't done that resistor. Seen a few threads mention it but haven't dug into it. Figures it was a pass or fail thing for a resistor.
Just wondering if your not getting enough air flow and the air is getting cooler by the time it reaches your feet or the windshield. The problem with the blower resistor was that it pulls too much current and was melting the plug, so Chrysler put a bigger heat sink (fins) on it.
If your blower resistor has not been replaced, that is not the problem I was thinking it was.
Have you pulled codes? See here: http://www.wjjeeps.com/climate.htm
It might actually be a mode door problem, or the foam is just too rotten and has come off. If that is the case, you will have to pull your dash and get into the HVAC box.
On that website, there is a recalibration procedure you might also try. The IOD fuse is fuse 15 in the fuse box under the hood.

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Unread 03-12-2014, 11:36 AM   #29
bwiygul
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I did pull the codes a while ago and one of the mid 50's was on there and I recal'd but it didn't fix it. One of the codes for a door travel too short or something. I forget. I was thinking mode door, it makes sense and will get to it hopefully this spring.

I was curious if the op fixed his or if he had problems like I do where it's better in one mode than the other. Still debating whether to cut my box or pull the dash and redo all the doors while I'm in there. Or just pull a jy box, rebuild it and then swap em really quick to avoid downtime.
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Unread 03-12-2014, 12:39 PM   #30
biffs
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Should the air coming from the blend doors be hot or cold? the doors themselves are moving properly, wondering if there should be a blast of hot air there or not. I'm also getting some warm air coming through, just enough to keep the windows clear but not to heat up the Jeep. Same situation as the OP, both hoses going into the heater core are hot, radiator has a very slow leak, fluid has been at the full line for weeks.

I'm told its possibly a worn out heater core - that the fins are dirty/rust/covered in sludge and not transferring heat properly.
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Build thread: http://www.jeepforum.com/forum/f197/biffs-build-thread-2000-wj-2102889/
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