Oops I did leave one stat out, pay. High pay for an equipment operator in 1974 was 5$ per hour. Today it’s 25-45$ per hour. Specialties and unions pays are higher. Now I’ll leave you to it.
Were you repairing a previously working AC system? When filling with refrigerant, you need a way to weigh it properly or calculate the amount needed to add to an empty system. Pressures are only relative to temperature and a tool to use for diagnosing. Static pressure means almost nothing in regards to refrigerant charge and will also change with temperature. That said, they're not THAT fickle about exact fill amounts. You have to be considerably over or undercharged for it to impact A/C operation so dramatically.
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