detroitgrip Posted July 22, 2020 Report Share Posted July 22, 2020 Is my ac clutchless? Pulley always spins even when ac is off. AC works great. 48°. Never had any maintenance done to it. 2009 journey 2.4L Thanks! Quote Link to comment Share on other sites More sharing options...
jkeaton Posted July 22, 2020 Report Share Posted July 22, 2020 The ac compressor will run by itself even with the ac system turned off to maintain humidity levels inside the cabin. detroitgrip and 2late4u 2 Quote Link to comment Share on other sites More sharing options...
Hankster Posted July 26, 2020 Report Share Posted July 26, 2020 Yes on the 2.4L its cluchless. It starts and stops by changing the pump displacement inside the compressor. Hank detroitgrip 1 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted July 26, 2020 Report Share Posted July 26, 2020 (edited) I think in the defrost setting it will cycle a/c to help lower humidity; but only to a certain lower temperature. To protect compressor I don’t believe it functions at a few degrees below zero or freezing point. The cycling also helps keep the compressor seals lubricated so they don’t dry out and leak. Edited July 26, 2020 by John/Horace detroitgrip 1 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted July 26, 2020 Report Share Posted July 26, 2020 There are variable displacement compressors that still have a clutch. Older units. https://www.bobistheoilguy.com/forums/threads/traditional-clutch-type-a-c-compressor-vs-variable.292066/#post-4800917 detroitgrip 1 Quote Link to comment Share on other sites More sharing options...
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