Leak test with nitrogen .......
Went to a job after other people had installed this complete unit and guages went on , low on freon .
Since the customer had enought of these " other" people , (i'm the # 3 man there ) i shut the Valves and proceded to test with nitrogen and left it for 1 Hr , even used soap to see "if" pinholes will show up . Nothingh .A course I finish the "other" problems ( bulb for expansion valve left hanging ) :
Here is the rest of the story : what got me was i was called by the same customer after 5 days and said he had some one else that found the leak ???
I would think that nitrogen would show up , even with the soap test , for pinholes, .............
Where did i go wrong ??????????