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1995 Ford F-150

Question: Ac recharge problems

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69kugerxr7, 5.0L V8, Glendale, AZ, December 16, 2009, 20:44

 Enthusiast

After replacing ac compressor,dryer, evaporator,flush....now shop says air blows hot, after refrig.charge, oil, orifice. No leaks detected. No blockages. Am I/we missing something? Condenser is clear/fine. This is second ac comp.(both new)Low readings on high and low side. Ac was working fine(blowing cold) before repairs.Comp. was making noise. (original)

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• Answer #1

  TurboSDCharger December 17, 2009, 14:57
  

   Technician

  So the compressor was replaced because it was noisy, and now it doesn't cool properly? What else was replaced at the time the compressor was replaced the first time? Can you post the pressures and the ambient and vent temperatures?
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  69kugerxr7, December 17, 2009, 17:57
  

   Enthusiast

  Low side: 60 psp. High side: 50 psp. Dryer, (accumulator) and evaporator were replaced. Evap. was clogged some. Original q. lists comp., evap, and dryer, all replaced? Don't recall the temps now...was hot air, I remember that. Original comp. was fried, ready to lock up.
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  TurboSDCharger, December 18, 2009, 10:04
  

   Technician

  If the system is charged properly, then you may still have some blockage in the system. This is a weird problem, the low side pressure is higher than the low? I would focus on why the high side pressure is too low, it is either not getting enough refrigerant to create the pressure, or the compressor is incapable of creating high pressure. I can't wait to hear the outcome on this one.
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  69kugerxr7, December 18, 2009, 14:32
  

   Enthusiast

  Where are you located, TurboSDCharger? (Aprroximately)
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  TurboSDCharger, December 18, 2009, 14:36
  

   Technician

  I'm in Northern California, near San Francisco
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  TurboSDCharger, December 18, 2009, 14:55
  

   Technician

  I know exactly what you're talking about, that is quite a restriction!
  Nice to hear it's fixed. I always say that "man made problems are the hardest to fix", because the symptoms can be unlike anything you'll encounter normally while working on cars.
  Happy Holidays!
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