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Old 02-05-2014, 09:27 AM   #1
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Blend door

Has anyone ever had problems with their blend door? I have an 2002 tj 2.5L. Heat doesn't get hot and after all trouble shooting my final thing to check is the blend door. Which many people think is the problem. I'm just curios of how detailed of a project it is gonna be. Pretty much what am I getting myself into and what I am looking for.

Thanks in advance.

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Old 02-05-2014, 02:47 PM   #2
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not sure on this i am having similar issues with my 97.
but I'm not getting heat out of the dash only the def. so i need to tear it apart to figure this out.

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Old 02-08-2014, 02:25 PM   #3
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not sure on this i am having similar issues with my 97.
but I'm not getting heat out of the dash only the def. so i need to tear it apart to figure this out.
If you're only getting heat out of the def... check this thread... it's a vacuum leak issue. defrost is the default setting when you have a leak.. check here.

Fan only blows out defrost vents...

Hope this helps! I just fixed this issue in mine... now i need to find out how to get the heat to actually blow.. i think it's a blend door issue.
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Old 02-09-2014, 12:41 AM   #4
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This might help.

Hot Air Again! Blend Door Actuator Repair - JeepForum.com

When you have the motor out see if you can move the blend door by hand. That may let you know if that is the problem.
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Old 02-09-2014, 01:00 AM   #5
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Kool thanks!! Ill start digging in to that then
I.can see it move when i move the cable
My jeep is a 97 this was on a 2000 so i will see what i can find. Anything is worth a shot at this point
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Old 02-09-2014, 09:20 AM   #6
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on my 97 same issue. the blend door arm was broke in 2 pieces. I was able to put a screw in it to hold it together till I could get a replacement arm. Never got around to ordering new arm and screw still holding 2 years later. air comes out correct vents now
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Old 02-09-2014, 11:24 AM   #7
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I see that defrost only is the default setting for a vacuum leak.... What if everything else works fine but defrost? All air shoots out my vents fine until I put it on defrost, then it just blows out from behind the dash some where and the defrost side vents, just not at the top of the dash....
97, no AC.
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Old 02-09-2014, 11:33 AM   #8
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My 98 is having similar problems it will randomly switch defrost an vents an then when you let off the gas it goes back to eat it's set on
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Old 02-09-2014, 03:08 PM   #9
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It may not be a vacuum line issue but that IS the usual easy place to look. I have been through two of those little arms so far in two years. I've come very close to taking a two handed sledge hammer to the dash of my Jeep. Vacuum actuated bullshit. I get aggravated just thinking about it. I usually flip upside down with my head down by the gas pedal and my feet on the ceiling of the hardtop to do the work on it. It is in a very difficult place to repair. Very hard even then to get your hands in the correct position to do the job.
Currently do not have vents. Currently on defrost only. Completely replaced A/C system last year including compressor, evaporator etc. That thousand dollars a complete waste. A/C is operable but weak at best. Like I said... real close to the sledgehammer.
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Old 02-10-2014, 12:29 AM   #10
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Joe21511, check the vacuum reservoir in the fender well under the battery connection. The hose probably is off or cracked & leaking vacuum.
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Old 02-10-2014, 12:12 PM   #11
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My 98 is having similar problems it will randomly switch defrost an vents an then when you let off the gas it goes back to eat it's set on
joe that is defiantly a van leak, the fact that it changes when you give it gas or not. the vacuum gauges you buy on the after market do the same thing as the motor runs it pulls vacuum when you let off it gives more.

my 56 chevy had vacuum wipers, you think the heat thing sux! lol try driving in a down pour with no wipers lol
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Old 02-10-2014, 12:13 PM   #12
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Originally Posted by BurlySoldier View Post
It may not be a vacuum line issue but that IS the usual easy place to look. I have been through two of those little arms so far in two years. I've come very close to taking a two handed sledge hammer to the dash of my Jeep. Vacuum actuated bullshit. I get aggravated just thinking about it. I usually flip upside down with my head down by the gas pedal and my feet on the ceiling of the hardtop to do the work on it. It is in a very difficult place to repair. Very hard even then to get your hands in the correct position to do the job.
Currently do not have vents. Currently on defrost only. Completely replaced A/C system last year including compressor, evaporator etc. That thousand dollars a complete waste. A/C is operable but weak at best. Like I said... real close to the sledgehammer.
if i can't get mine fixed ill hold yours still while you hit it!

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