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The AC clutch on my Jeep Liberty 2006 won't engage. Here is what I have checked so far.

  • Fuse 14 in the passenger cabin

  • 21 in the engine compartment are ok

  • AC relay ok

When I jump the AC relay I am able to engage the compressor and get cold air, pressure at rest is about 105 pounds at 60 degree F. When the compressor is running it drops to 35 psi. I can't check the high pressure side because I don't have a gauge for it. If I jump the low pressure switch nothing happens. Not sure where to go from here.

Does anyone have an idea of what could be wrong?

What could be the root cause of this behavior?

DucatiKiller
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mark b
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2 Answers2

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It may be a blown fuse. AC compressor clutches receive power in a number of ways. They can activate through a relay that’s energized directly by a proper condition of the low and high pressure switches. Or, the relay can be operated by the PCM which has interpreted the condition of the low and high pressure sensors.

wilkvolk
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Check low pressure switches on on the condenser the other on theCompressor. They can go bad. Make sure you have enough refrigerant and also make sure you follow the belt routing guidelines. It's really easy to mess it up. Because there are numerous ways to put the belt on and have it Work that will make the clutch slip more often than not. You'll get a SQUEALING youLL smell something burning. But yours is not engaging, just FYI. Good luck.

Frank
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