[Richard]

I have plenty of downtime in our journey up the Alaska Hiway. Rhonda didn’t want me to burn out driving, so I have been noodling your statement that you saw the same pressures with just 6 oz of refrigerant in the system.

That didn’t seem right to me, but there is one situation that may result in that, so I have to ask. When you were filling from the jug on the scale and watching the gauges, were you closing the low side knob to get pressure readings? The reason I ask, is that if you don’t close the low side knob, then the gauge is seeing the pressure of the refrigerant in the jug NOT the system, and furthermore the high side will be unusually high because the compressor is being flooded with vapor from the jug.

Do you recall? I am not trying to be a smart aleck, but you are doing an admirable job of learning AC basics. I have made every mistake in the book, and I am just trying to help you avoid my mistakes.

Sorry, couldn’t help on specific coils. I am in Canada, and google knows that. Meaning anything I find retail starts with Canadian suppliers.