Its 100* out and we were seeing avoit 45psi on both the low and high side with the compressor on or off. The only thing that happened when we turned the compressor on is the low side pressure would drop to maybe 10psi for a second or 2 and then go back up to 45. The high side never changed. We evacuated the system for 40min I'm not sure what the pressure was at after. I put approximately 18oz of freon

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