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Old 12-17-2008, 07:36 PM
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Looking at buying wrangler. HELP

I'm looking at a 94 wrangler and it had the motor rebuilt with like 20 miles by a name shop. it only has 143,000 miles on body.
My concern is that the heater hardly blows, so is it an easy fix with a heater core change??


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Old 12-17-2008, 08:23 PM   #2
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If it "hardly blows," that sounds like a blower motor problem or a duct problem. If it blows and doesn't get hot, then you may have a heater core issue.
1st, check to be sure the blower is functioning, then check the ducts for an obstruction like leaves or a mouse nest! Next, check the slide control linkage to be sure that it is connected. You can see the connection in front of the passenger compartment below the glove box.

This should get you started. It's always easier and cheaper to start with the small items and eliminate them before you start spending $$$!

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Old 12-17-2008, 09:55 PM   #3
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x2 check fuses and plugs etc
89 yj 4.0 conversion 89 grand waggy tbi
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Old 12-17-2008, 10:34 PM   #4
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sometimes aftermarket blower motors come without the connector, so the installer has to cut the connector off the old motor, and put it on the new blower motor, people will cross the wires, so the blower motor spins backwards, and barely blows. just one more thing to think about.
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Old 01-02-2009, 09:47 PM   #5
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we are talkin about a 94 . i bet the heater core is original . it probadly wouldnt hurt to take the heater box off, replace the heater core and maybe the blower motor, and since u have it off take a air compressor and blow any obstructions . i am about to enbark on the same thing . but i love to play mechanic . what u decide good luck
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Old 01-03-2009, 03:21 PM   #6
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Mine blows fine, just I have a lot of sticks and natural debris down in the passenger firewall air box or somehting like that anyone know what to do?
Mine: 1987 YJ 4.2 5spd soft top
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Old 01-06-2009, 07:11 PM   #7
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i would rather have heat problems to troubleshoot and a freshly rebuilt motor than the opposite..

post some pics!
97 TJ, 4cyl, auto, bone stock, 86k miles.
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Old 01-06-2009, 07:18 PM   #8
that's what she said

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changing the heater core in a yj is relatively easy. it is pretty out in the open. my husband had to replace the heater core in his '90 yj. it took him about 3 hours to do it and he had never done it before and he was 18.

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