Question about 1995 Isuzu Pickup

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95 Isuzu Rodeo AC problem

My AC doesn't work correctly and I can't figure it out. It is nice and cold when the compressor is running the trouble is that the compressor will not stay on. Most of the time it won't come on at all. The light on the AC button stays iluminated when the button is pressed, the relay and fuse are both good. I am thinking this is an electrical problem because I had a shop evacuate and recharge the system and I still have the same problem. Their best guess was that the radiator was clogged and the pressure would build up too high and shut off the compressor but I don't think that fits the symptoms. Especially since now it won't come on at all.

3 things I am thinking. Either 1 the AC button is not working or 2 the thermostat that turns on and off the compressos is not working or 3 the leaking valve covers have leaked so much oil into the compressor electronics that they are shorting out.

Any guesses? Thanks for your help.

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  • sansouci01 Mar 28, 2009

    I have the same problem with my 97 rodeo. The compressor comes on and cools for a few minutes and then goes off. If I turn off the ac button for a few minutes and turn it back on and the ac runs fine for a few more minutes. I checked the charge and it's fine.

  • honeymokey
    honeymokey May 11, 2010

    Fan clutch!

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Can the compressor be jumpered to make run if so then its ahigh pressure switch problem,clogged radiator has nothing to do with a/c

Posted on Nov 12, 2008

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I know by now you repaired the problem or sold the truck. but your right in your ideas, I'm just a shade tree, but these isuzu's ****, the tapping, lifters, the hydrulic timming belt tightner, **** on all of it. the a/c, I've replaced the electric fan, chased all the harneses down, replaced the relay under the hood, all thats left is what your thinking of, I will let you know tomorrow. does your belt squeal at times? change your water pump. if it goes it will upset the timming belt and all hell breaks loose, mine cut threw the belt covers ripped the belt up. fun! today is June 18, 2009,

Posted on Jun 18, 2009

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I will jump it at the relay tomorrow. I may have mis spoke on the radiator. I meant the part in front of the radiator. Where the high temperature high pressure R134a goes to be cooled. Is that the evaporator or condenser? Either way, their theroy was that some contaminates are restricting the flow in there but their gauges wern't showing it

Posted on Nov 12, 2008

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