A/C Not Coming out of Vents or defrost. Only Floor. Need Help!

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May 20, 2012 | 01:36 PM

#61

freegdr

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Joined: Mar 2010

Posts: 47,923

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From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

Quote:

Originally Posted by rookcherokee

I know, I just can't seem to find where this is actually located:

Behind my control unit is just that wiring harness seen in the picture I took. Everywhere I read says the vacuum lines should be behind there as well

you are aware these are vacuum lines not electric

May 20, 2012 | 01:37 PM

#62

rookcherokee

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Joined: Feb 2009

Posts: 292

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From: Wenatchee,WA

Year: 1995

Model: Grand Cherokee

Engine: 5.2L V8

Quote:

Originally Posted by freegdr

you are aware these are vacuum lines not electric

Yeah, was just saying that those vacuum lines weren't behind my a/c control unit like in the picture.

May 20, 2012 | 01:39 PM

#63

freegdr

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Joined: Mar 2010

Posts: 47,923

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From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

Quote:

Originally Posted by rookcherokee

Yeah, was just saying that those vacuum lines weren't behind my a/c control unit like in the picture.

gotta be there somewhere

May 20, 2012 | 01:43 PM

#64

rookcherokee

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From: Wenatchee,WA

Year: 1995

Model: Grand Cherokee

Engine: 5.2L V8

Quote:

Originally Posted by freegdr

gotta be there somewhere

Well, it turns out the Automatic Temperature Control system is electrically controlled, not vacuum controlled. So these aren't on mine at all, it's only wires..

.. Yeah, news to me too

May 20, 2012 | 01:43 PM

#65

freegdr

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Joined: Mar 2010

Posts: 47,923

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From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

do you have this link....http://www.jeep4x4center.com/knowledge-base/index.htm

May 20, 2012 | 05:07 PM

#66

rookcherokee

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From: Wenatchee,WA

Year: 1995

Model: Grand Cherokee

Engine: 5.2L V8

Quote:

Originally Posted by ol"blue

I went to a couple of places today to check into this. The Automatic Temperature Control system is electrically controlled, not vacuum controlled. So I looked at the pic of your ac control, and it has two large ***** with the dial temp setting, not three large *****. So you have the ATC system.
This is from my '97 ZJ FSM. It may be different in your '95 manual. The system can run a self diagnostic.

Tried the self diagnostic and no fault codes came up - it showed 00. I read that the codes are erased when the battery is disconnected/connected, but wouldn't it throw a code once I used the a/c controls again?

Where should I go from here?

May 20, 2012 | 06:01 PM

#67

ol"blue

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Joined: Mar 2009

Posts: 28,068

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From: Tenn. and Mich.

Year: 2004

Model: Grand Cherokee

Engine: 4.7L V8

Quote:

Originally Posted by stev-o

my ac is only coming out of the defrost up by the windshield and not out of the vents why is that it use to work just fine

Sounds like you have a vacuum leak. Check all the vacuum lines, the cruise control solenoid if equipped, and the vacuum cannister.

May 20, 2012 | 06:07 PM

#68

ol"blue

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From: Tenn. and Mich.

Year: 2004

Model: Grand Cherokee

Engine: 4.7L V8

If you didn't get a code showing the control head/assy. was bad, I'd say the cause of your issues in your 1st post would be the blend doors. That's a fairly common issue with the Grand Cherokees. >http://www.heatertreater.net/indextech.html#window

May 20, 2012 | 06:20 PM

#69

rookcherokee

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From: Wenatchee,WA

Year: 1995

Model: Grand Cherokee

Engine: 5.2L V8

Quote:

Originally Posted by ol"blue

So the 98-04 blend doors on that site will fit on mine okay? I don't see any for the 97 and earlier.

May 20, 2012 | 06:38 PM

#70

ol"blue

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Joined: Mar 2009

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From: Tenn. and Mich.

Year: 2004

Model: Grand Cherokee

Engine: 4.7L V8

I can't answer that. You'd need to check with them.

May 20, 2012 | 08:50 PM

#71

wifin

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Joined: Nov 2011

Posts: 448

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From: Falls Church, VA

Year: 2000

Model: Cherokee

Engine: 4.0 I6

Just checking in to see how you're problem is turning out. Hope it's getting better haha

May 21, 2012 | 10:15 PM

#72

rookcherokee

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From: Wenatchee,WA

Year: 1995

Model: Grand Cherokee

Engine: 5.2L V8

Does anyone have a link to or write-up for changing the '95 blend doors without removing the dash? (A hack method) I've seen them for the '98+: http://www.nc4x4.com/forum/index.php...re-dash.79583/ but not for the '95. I don't want to cut into the wrong part of the box.

Moreover, is this even possible in the '95? Or will I have to remove the dash and box?

Last edited by rookcherokee; May 21, 2012 at 10:20 PM.

May 22, 2012 | 08:17 AM

#73

ol"blue

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Joined: Mar 2009

Posts: 28,068

Likes: 6

From: Tenn. and Mich.

Year: 2004

Model: Grand Cherokee

Engine: 4.7L V8

I checked w/the dealer about this. They offer the blend door for your '95 ZJ w/ the ATC system, part # 501292AA (or 5012922AA sorry). Price $49.10.
They said it didn't look like you could repair it like the later models, thought you'd have to remove the unit to repair. I can't find any other info either way.
I would have thought they would be similar though, and you could.

May 22, 2012 | 02:22 PM

#74

rookcherokee

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From: Wenatchee,WA

Year: 1995

Model: Grand Cherokee

Engine: 5.2L V8

Quote:

Originally Posted by ol"blue

Thanks for all the info, Blue. I appreciate it!

Was hoping to hear I didn't have to take the dash apart and pull the box. The dash isn't too bad, just not looking forward to removing the box.. seems like a bit of a pain, with the heater & a/c hoses.

We'll see how it goes.