Maybe.............maybe I have solved this riddle

A long time ago I had the same problem

These "domestics" sometimes have the capillary tube enter the suction pipe just after the filter, and exit again just before the evaporator coil.

This is to provide a good exchanger

Anyways, a hairline crack appeared on the capillary INSIDE THE SUCTION PIPE, so the liquid refrigerant pissed all the way back into compressor.

I couldnt understand it!!! Suction pipe was FROZEN !!!!

Have I solved the puzzle???

Change the capillary I say

And you guys thought I was a thicko!!!

And Marc, your Av is great

Not sure about your Calculus and formulas though!!!

Lol