Diagnosis?

Dave in Texas on Wed August 04, 2010 6:17 PM

Not my car but a friend asked: 98 DeVille. Low 90psi/High 0. Oily discharge from register vents. Shot compressor and hole in evap?

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At 2, I went home with a 10. At 10 I woke up with a 2 !!

TRB on Wed August 04, 2010 8:48 PM

Really only two ways to get an oily residue on the vents. Heater core or evap leak. I don't see this very often unless a core really lets go. might check to see if someone has been using some dash protectant. Double check that the high side was attached correctly.

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Dave in Texas on Wed August 04, 2010 9:05 PM

Residue was being blown out of the vents. AC was fine until one day it started blowing hot air. Says clutch is engaging and compressor appears to be turning. I suggested he check if refrigerant present and if so, evacuate and see if vacuum holds.

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At 2, I went home with a 10. At 10 I woke up with a 2 !!

Chick on Wed August 04, 2010 11:01 PM

Cads will shut down the compressor if the system is low, seems more like the gauges aren't hooked up right and depressing the shrader valve.. But you do need to find what it's blowing out the vents, antifreeze can be very harmful, if it's refrigerant and oil the compressor would have shut down long ago...

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Chick
Email: Chick

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TRB on Thu August 05, 2010 12:55 AM