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Unread 06-07-2013, 12:20 PM   #1
ramsey6199
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1990 YJ Wrangler 
 
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Location: crowley, louisiana
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jeep wrangler a/c issues

1990 wrangler 4.2 Laredo
Turn on a/c and it makes horrible clicking and scratching noises. A/c does actually blow semi cold after a few minutes but the noise is quite loud. Can't seem to hear it from outside near engine bay but definitely when you turn the ac knob on. Any ideas what this is, really looking to get air condition in the near future. This also was present on my 95 as well.

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Unread 06-07-2013, 12:29 PM   #2
Xzero117
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compressor is going bad, might be some of the internal bearings or the clutch itself on the compressor

I would start looking into a new one

it makes a sound when the ac is turned on because the a/c compressor is engaging as opposed to not being engaged when the a/c is off thus preventing the noise from occurring

Edit- so I misread, you can't hear it from outside or near the engine bay ? then I suspect the blower motor going bad, basically the little fan inside the cabin which blows air at you, it should be making this noise no matter if the a/c or heat is on actually
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Unread 06-07-2013, 12:31 PM   #3
87TPIYJ
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Just guessing because I cant hear it, but if you cant hear it outside then its probably the blower motor or something in your blower.
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Unread 06-07-2013, 12:52 PM   #4
ramsey6199
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I definitely can not hear it from outside. Just looked at the blower motors. All the ones I see are blower motors but under the description say no a/c. Any particular place where you guys buy yours.
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Unread 06-07-2013, 01:03 PM   #5
Leans93
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I bought mine from here: http://www.jeepair.com/
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Originally Posted by Mike Jones
Catch me on the highway or about to tear the mall up.
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Unread 06-07-2013, 01:05 PM   #6
stu1021
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If it is coming from inside then I would guess blower motor - there is a dedicated one for the A/C unit in your jeep. Try turning the "air" knob on (all the way to 4) with the "temp" knob turned all the way down to 0 and see if the noise is present. If it is your blower is going bad or something (leaves, debris) has made it's way into there. If it sounds normal until you move the "temp" knob off of 0 and then it gets noisy then the problem is most likely in your A/C compressor as it doesn't engage until you turn the temp knob to the right. You can verify this when the jeep isn't running by turning the knob to 0 and back - if it is working properly you will hear a click when begin to turn it right from the 0 position.
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Unread 06-07-2013, 01:13 PM   #7
ramsey6199
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When fan is turned on with the a/c off it makes the noise. So this would be the a/c blower?
So these would be the items I need, Correct?
http://www.jeepair.com/air-condition...-motor-178.php
http://www.jeepair.com/air-condition...wheel-1271.php
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Unread 06-07-2013, 01:27 PM   #8
Leans93
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Mine had a horrible noise coming from it until it burned out. I only needed to replace the blower motor. My wheel was still in good shape. But yes the parts you listed are what you may need but the wheel may be unnecessary. The A/C unit is only held on by 4 screws so before you order just pull it down and see whats broken and then order the parts you need.
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93' YJ 4.0L AX-15, 4" Pro Comp lift, 3/4" shackles, 1" BL, 33x12.5x15 BGF MT's, and some other stuff


Quote:
Originally Posted by Mike Jones
Catch me on the highway or about to tear the mall up.
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Unread 06-07-2013, 01:31 PM   #9
ramsey6199
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Thank you guys. Been a big help.
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Unread 06-07-2013, 01:37 PM   #10
87TPIYJ
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Drop the blower motor (on the driverside). Try it with motor out. You may want to take the squirrel cage off first. Then you will know for sure.
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Unread 06-12-2013, 01:55 PM   #11
ramsey6199
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How do you get to it?
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Unread 06-12-2013, 04:08 PM   #12
Leans93
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There are just 4 screws just under the edge of the dash that hold it in place. Undo those screws and it will come down. All will be exposed as the whole unit comes down. You can leave the freon lines attached as to not lose your coolant, they will (should, mine always have) flex and allow you to set the unit on the floor/trans hump of the Jeep. From there you can remove the blower motor/wheel/etc as needed.
__________________
M.F. Leans


93' YJ 4.0L AX-15, 4" Pro Comp lift, 3/4" shackles, 1" BL, 33x12.5x15 BGF MT's, and some other stuff


Quote:
Originally Posted by Mike Jones
Catch me on the highway or about to tear the mall up.
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