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No AC

Tiny
ROBERT1468
  • MEMBER
  • 1997 SATURN SW1
  • 1.8L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
AC Compressor housing at 220 degrees on a 75 degree day. Both high and low lines very hot, but cool at pressure switch. I have 2 gauges, one says 25 psi and the other says 40 psi. I get no cold at all. Compressor is running constantly.
Tuesday, February 9th, 2016 AT 1:58 PM

6 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Those pressures make no sense. Diagnosing AC issues requires a lot of experience and observations. It's definitely not a DIY job. There are way too may things to go wrong and way too many things that have to be observed and analyzed. The very first step is a complete evacuation and recharge. It's the only way to know exactly how much refrigerant is in the system. The pressures don't mean anything until you have the exact correct charge.
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Tuesday, February 9th, 2016 AT 4:36 PM
Tiny
ROBERT1468
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Thanks for the response:
The pressures that I gave you are only the low pressure side, the gauges just don't agree what it is. The 40 psi is a true reading. If the expandtion valve is stuck closed, or can the dryer plug-up and be the cause.
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Tuesday, February 9th, 2016 AT 6:39 PM
Tiny
WRENCHTECH
  • MECHANIC
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As I said, the pressures don't mean a thing until you have the exact weight charge and then just having the low only reading won't tell you anything.
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Tuesday, February 9th, 2016 AT 6:46 PM
Tiny
ROBERT1468
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Okay, Thanks
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Tuesday, February 9th, 2016 AT 6:48 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,345 POSTS
What is the high side reading?
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Wednesday, February 10th, 2016 AT 7:51 AM
Tiny
WRENCHTECH
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He doesn't have one Ken.
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Wednesday, February 10th, 2016 AT 8:10 AM

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