Refrigerant pressure diagnosis

relative4relative4 Member Posts: 1
edited September 2021 in Honda
Working on an '07 Honda Civic LX sedan, auto, 43K miles.  No cooling from AC.  Static pressure is 125 PSI (it's hot out).  When the clutch engages, the compressor sounds fine, no ugly noises.  The low side pressure drops to like 110-115 PSI, and the high side pressure drops slightly as well.  Before deciding the expansion valve is bad, anything I should consider / try?  Thanks!


  • thecardoc3thecardoc3 Member Posts: 5,728
    The expansion valve wide open is still a sufficient restriction that the compressor should be able to build pressure against. The pressures suggest that the compressor has failed.
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