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The high-pressure service gauge port valve is located on the compressor-to-condenser discharge line near the condenser fitting.
The low-pressure service gauge port valve is located on the suction accumulator outlet tube
will not work, pressure is to much to make connection. will contact local dealer for service.
With the engine off the pressures should not be that high there is nothing pumping so the pressures will equalize and will get to or near ambient temp. Just let it sit awhile before trying to hook it up. It must be something with your quick connect fitting. You should be able to get a fitting to connect without any problem up to 200 psi and there is no way yours can get that high with the engine off unless you are near a volcano or something.