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Old 07-25-2010, 03:52 PM   #1
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Join Date: Dec 2008
Location: Staten Island NY
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Really Frustrated with Air Conditioner

99 4cyl.

when i first got it, compressor would cycle on and off, but i had a blown blower resistor, which i replaced with a mopar piece (prior to that i couldnt turn on the heater). I then replaced the controller in the dash because part of it was fried.

Now, i have all the new parts in, checked the low pressure a/c pipe and it has good PSI, but the compressor will not click on. You can hear the change in idle but it wont click on.

When i press the compressor clutch, it catches cycles for a bit then stops. I can feel the AC pipes get cold.

Does anyone know where my issue is? i even swapped the relays under the hood. I NEED A/C its F***in hot in NY.

If not, please direct me to a place that can diagnose and not rip me off.

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Old 07-25-2010, 07:09 PM   #2
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Could be the compressor clutch itself. Some compressor clutches are not replacable without overhalling it. Most of the time you got to buy a whole new compressor, not sure exactly how it is on the Wrangler, have not analyzed mine yet.

But one way to test is to hotwire the compressor clutch fire, put a temp switch on it and click it on, this eliminates everything else. If the clutch fails to engage, its definetely the clutch and needs to be replaced.

If the clutch does engage and no issues at idle (when testing it) and never disengages until you flip the temp switch, then we got to start looking elsewhere. Such as making sure the pressure switch is working, when pressure is too low, there is a switch that tells the controller not to engage the clutch, you mentioned pressures are fine (hopefully you adjusted your reading for ambient temps) so could be the switch itself. You could always hotwire the switch to also test to see if that is a cause as well (after the clutch test passes).

Basically gotta run down the line to start testing the AC components.

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