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Old 02-26-2014, 12:22 AM   #1
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Too much heat!!!

Hey guys, here's my predicament:
No matter what, my blower has always been on when the Jeep is running, usually I was able to keep it on low and "colder" air (as I have no AC) when the outside temp is hot.
Well, recently my core sprung a leak and I took it on and replaced it. This is nice because I have nice hot and toasty heat...but now I can't turn it off-even on the lowest blower setting and the dial cranked towards cold.
I checked my vacuum line and saw no leaks; checked both connections and noticed no cracking. The unit located underneath the battery (sorry I forgot the name) I read is notorious for going out/cracking, but from what I saw it was fine. When I unplugged the hose it let out a good amount of pressure which tells me there is no leak.
Would anyone else know where to start on this? It's not an emergency, just annoying and summer in WA state is coming up.

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Old 02-26-2014, 01:39 AM   #2
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I'm from WA as well And have an 03 TJ. I'll take a look tomorrow when I get to the shop. And see what else might be causing your heat to not switch.

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Old 02-26-2014, 01:41 AM   #3
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Quote:
Originally Posted by CowboySnR View Post
I'm from WA as well And have an 03 TJ. I'll take a look tomorrow when I get to the shop. And see what else might be causing your heat to not switch.
Thanks!
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Old 02-26-2014, 04:35 AM   #4
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It sounds like the blend door that routes air through or around the heater core is not operating.
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Old 02-26-2014, 06:04 AM   #5
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I couldn't shut mine off either, took me a couple days to figure out my knob was striped. Just something easy to check.
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Old 02-26-2014, 11:05 AM   #6
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Neil F.: I was thinking that too but wanted to check my options. I did the heater core swap myself and took my time-even longer when it came to putting the core housing together as it was a b**** to make sure the blender door was seated properly. Before mounting the housing I checked the door manually and it seemed fine-maybe it's the unit that operates it? What I mean is the little motor-looking do-hickey that connected to the bottom of the blend door. Does anyone know what this is called?

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