Posted by Texasmark1 on July 22, 2020 at 15:54:53 from (172.243.92.145):
Going to start with this short then expand as necessary.
I only have 150# across my compressor (15-165#) when testing per the manual at 1500 rpms. Manual says I should have more like 200 (25-225)on a 90* day . Dryer was replaced, vac pulled 26" 30 min, new 134a fill to at least 95% max. Cab hot, condenser coil right at ambient.
I think my expansion valve is opening because once turning off the system, it takes 2 minutes for the system pressures to stabilize to 110#. If it were closed would it do that so fast? What would be the path? Do compressors in serviceable condition block freon when off? I would expect so since they build pressure through the same ports/mechanisms.
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