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I have an intermittent problem with my AC. Sometimes the air will no longer be cool. It seems to occur more often during low rpm when driving around town. I've checked the condenser and it seems to work fine. I've check the pressure and it is okay. I recharge with one of those AC bottles that a person can buy at the auto parts store that has a gauge on it. Any thoughts?
 

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Had a similar issue with my rig; it would gradually go to the Defrost setting when idling. I found out that the climate controls run off of the vacuum pump. I checked the hoses and ending up replacing the pump itself.
 

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Mine would be intermittent due to the wiring connection on top of the pump. I had to "tighten up" the female pins for better contact. Just something else to check. Cheers!
 
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