Question about 2005 Dodge Durango

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Not cooling I have a 99 chevy suburban that won't cool over 60 degrees when driving and when idling only cools to 70 degrees. I have replaced the AC compressor twice, orfice tube, rear expension valve, accumilator, fan clutch, and I have cleaned the debree(sp) from the radiator. My low pressure is 70 PSI and my high pressure is 300 PSI after charging it. I have put 4.5 lbs of frion in it. We have about 80% humidity here and the heat index is about 102 degrees. We live in TX. Can some body help a brother out please.

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Your low for 134A should not exeeed 45 Psi and highs for 134A shouldent get above 300. When your replacing stuff are you cleaning out the residue from your evap and condensor prior to reinstalling Freon?allso adding oil. and vacumeing your system prior to charging helps to get all the moisture out. In high humidity its crutial for optimal cooling and when system is open to the humidity for some time it gets loaded with water and vacuming can sometimes take as long as 10 hours

Posted on Jul 30, 2009


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